A. Murmuring angers God:

NUM 11:1. And when the people complained, it displeased the LORD: and the LORD heard it; and his anger was kindled; and the fire of the LORD burnt among them, and consumed them that were in the uttermost parts of the camp.

NUM 11:10. Then Moses heard the people weep throughout their families, every man in the door of his tent: and the anger of the LORD was kindled greatly; Moses also was displeased.

NUM 11:33. And while the flesh was yet between their teeth, ere it was chewed, the wrath of the LORD was kindled against the people, and the LORD smote the people with a very great plague.

NUM 21:4. And they journeyed from mount Hor by the way of the Red sea, to compass the land of Edom: and the soul of the people was much discouraged because of the way.

NUM 21:5. And the people spake against God, and against Moses, Wherefore have ye brought us up out of Egypt to die in the wilderness? for there is no bread, neither is there any water; and our soul loatheth this light bread.

NUM 21:6. And the LORD sent fiery serpents among the people, and they bit the people; and much people of Israel died.

1CO 10:10. Neither murmur ye, as some of them also murmured, and were destroyed of the destroyer.

NUM 17:10. And the LORD said unto Moses, Bring Aaron's rod again before the testimony, to be kept for a token against the rebels; and thou shalt quite take away their murmurings from me, that they die not.

B. God may take us at our word:

NUM 14:1. And all the congregation lifted up their voice, and cried; and the people wept that night.

NUM 14:2. And all the children of Israel murmured against Moses and against Aaron: and the whole congregation said unto them, Would God that we had died in the land of Egypt! or would God we had died in this wilderness!

NUM 14:26. And the LORD spake unto Moses and unto Aaron, saying,

NUM 14:27. How long shall I bear with this evil congregation, which murmur against me? I have heard the murmurings of the children of Israel, which they murmur against me.

NUM 14:28. Say unto them, As truly as I live, saith the LORD, as ye have spoken in mine ears, so will I do to you:

NUM 14:29. Your carcases shall fall in this wilderness; and all that were numbered of you, according to your whole number, from twenty years old and upward which have murmured against me.

NUM 14:30. Doubtless ye shall not come into the land, concerning which I sware to make you dwell therein, save Caleb the son of Jephunneh, and Joshua the son of Nun.

NUM 14:31. But your little ones, which ye said should be a prey, them will I bring in, and they shall know the land which ye have despised.

NUM 14:32. But as for you, your carcases, they shall fall in this wilderness.

NUM 14:33. And your children shall wander in the wilderness forty years, and bear your whoredoms, until your carcases be wasted in the wilderness.

NUM 14:34. After the number of the days in which ye searched the land, even forty days, each day for a year, shall ye bear your iniquities, even forty years, and ye shall know my breach of promise.

NUM 14:35. I the LORD have said, I will surely do it unto all this evil congregation, that are gathered together against me: in this wilderness they shall be consumed, and there they shall die.

C. Any murmur is ultimately a murmur against God:

EXO 16:7. And in the morning, then ye shall see the glory of the LORD; for that he heareth your murmurings against the LORD: and what are we, that ye murmur against us?

EXO 16:8. And Moses said, This shall be, when the LORD shall give you in the evening flesh to eat, and in the morning bread to the full; for that the LORD heareth your murmurings which ye murmur against him: and what are we? your murmurings are not against us, but against the LORD.

EXO 16:9. And Moses spake unto Aaron, Say unto all the congregation of the children of Israel, Come near before the LORD: for he hath heard your murmurings.

EXO 16:10. And it came to pass, as Aaron spake unto the whole congregation of the children of Israel, that they looked toward the wilderness, and, behold, the glory of the LORD appeared in the cloud.

EXO 16:11. And the LORD spake unto Moses, saying,

EXO 16:12. I have heard the murmurings of the children of Israel: speak unto them, saying, At even ye shall eat flesh, and in the morning ye shall be filled with bread; and ye shall know that I am the LORD your God.

EXO 16:13. And it came to pass, that at even the quails came up, and covered the camp: and in the morning the dew lay round about the host.

NUM 16:11. For which cause both thou and all thy company are gathered together against the LORD: and what is Aaron, that ye murmur against him?

D. It causes others to murmur too:

NUM 11:4. And the mixt multitude that was among them fell a lusting: and the children of Israel also wept again, and said, Who shall give us flesh to eat?

NUM 11:5. We remember the fish, which we did eat in Egypt freely; the cucumbers, and the melons, and the leeks, and the onions, and the garlick:

NUM 13:30. And Caleb stilled the people before Moses, and said, Let us go up at once, and possess it; for we are well able to overcome it.

NUM 13:31. But the men that went up with him said, We be not able to go up against the people; for they are stronger than we.

NUM 13:32. And they brought up an evil report of the land which they had searched unto the children of Israel, saying, The land, through which we have gone to search it, is a land that eateth up the inhabitants thereof; and all the people that we saw in it are men of a great stature.

DEU 1:27. And ye murmured in your tents, and said, Because the LORD hated us, he hath brought us forth out of the land of Egypt, to deliver us into the hand of the Amorites, to destroy us.

DEU 1:28. Whither shall we go up? our brethren have discouraged our heart, saying, The people is greater and taller than we; the cities are great and walled up to heaven; and moreover we have seen the sons of the Anakims there.

NUM 14:36. And the men, which Moses sent to search the land, who returned, and made all the congregation to murmur against him, by bringing up a slander upon the land,