It's God's Way or the Highway - Numbers 20:10-13

In this story the Israelites rebel against Moses and Aaron because there is no water in the wilderness where they have been led. Moses and Aaron seek God and God tells them to assemble all Israel and in front of them command water to come out of a rock. This story is similar to the one in Exodus 17 except in the Exodus story Moses is told by God to strike the rock with his staff while in this story God tells Moses to command the rock to yield its waters. Unfortunately, Moses becomes angry with the people because of their rebellion and he strikes the rock with his staff twice. Although the rock yielded its water, God banned Moses and Aaron from entering the promised land because of their unbelief and subsequent failure to represent God as holy to Israel. Moses and Aaron should have been exemplary in their obedience to God, but on this occasion allowed their anger toward the people (and possibly toward God) to deflect their obedience to God's command. Obedience to God is an all-or-nothing proposition. God demands total adherence to His commands--you can't mostly obey God, you must completely obey God.