Numbers 21:5 New International Version (NIV)
5 they spoke against God and against Moses, and said, “Why have you brought us up out of Egypt to die in the wilderness? There is no bread! There is no water! And we detest this miserable food!”
The source of Israel’s complaining came from lack of faith in God, refusing to obey, and they forgot about the miracles that God had done for them. Do you find yourself complaining at times? If you do, look for the root of it. Could it be a lack of faith in God. Could it be that you do not want to obey. Could it be that you have forgotten all the things that God has done for you. Deal with the cause of your complaining, so it will not take hold and grow in your life.