Num 20:12 And the LORD said to Moses and Aaron, “Because you did not believe in me, to uphold me as holy in the eyes of the people of Israel, therefore you shall not bring this assembly into the land that I have given them.” These are the waters of Meribah, where the people of Israel quarreled with the LORD, and through them he showed himself holy.
2 Chronicles 20:20 And they rose early in the morning and went out into the wilderness of Tekoa. And when they went out, Jehoshaphat stood and said, “Hear me, Judah and inhabitants of Jerusalem! Believe in the LORD your God, and you will be established; believe his prophets, and you will succeed.”
Isaiah 7:9 And the head of Ephraim is Samaria, and the head of Samaria is the son of Remaliah. If you are not firm in faith, you will not be firm at all.’”
Matthew 17:17 And Jesus answered, “O faithless and twisted generation, how long am I to be with you? How long am I to bear with you? Bring him here to me.”
Luke 1:20 And behold, you will be silent and unable to speak until the day that these things take place, because you did not believe my words, which will be fulfilled in their time.”
Luke 1:45 And blessed is she who believed that there would be a fulfillment of what was spoken to her from the Lord.”
Romans 4:20 No unbelief made him waver concerning the promise of God, but he grew strong in his faith as he gave glory to God,
Deuteronomy 1:37 Even with me the LORD was angry on your account and said, ‘You also shall not go in there.
Deuteronomy 32:51 because you broke faith with me in the midst of the people of Israel at the waters of Meribah-kadesh, in the wilderness of Zin, and because you did not treat me as holy in the midst of the people of Israel.
Deuteronomy 3:23-26 “And I pleaded with the LORD at that time, saying, ‘O Lord GOD, you have only begun to show your servant your greatness and your mighty hand. For what god is there in heaven or on earth who can do such works and mighty acts as yours? Please let me go over and see the good land beyond the Jordan, that good hill country and Lebanon.’ But the LORD was angry with me because of you and would not listen to me. And the LORD said to me, ‘Enough from you; do not speak to me of this matter again.
Moses and Aaron distrusted the word and power of God, and that they yielded to the impulse of impatience and anger, as betrayed both by the language which they used and by the double smiting of the rock, to which Moses had been commanded only to speak. To what degree Aaron was concerned in these sins can be inferred only from the facts that he, as well as Moses, was charged with the sin of unbelief, and that the punishment of exclusion from the land of Canaan was inflicted upon both. (Ellicott)
God is as able as ever to supply his people with what is needful for them. But Moses and Aaron acted wrong. They took much of the glory of this work of wonder to themselves; Must we fetch water? As if it were done by some power or worthiness of their own. They were to speak to the rock, but they smote it. Therefore it is charged upon them, that they did not sanctify God, that is, they did not give to him alone that glory of this miracle which was due unto his name. And being provoked by the people, Moses spake unadvisedly with his lips. The same pride of man would still usurp the office of the appointed Mediator; and become to ourselves wisdom, righteousness, and sanctification, and redemption. Such a state of sinful independence, such a rebellion of the soul against its Saviour, the voice of God condemns in every page of the gospel. (Henry)
And yet they did not doubt of the power of God, but of his will, whether he would gratify these rebels with this further miracle, after so many of the like kind. And besides the words themselves, it is considerable, both with what mind they were spoken, which God saw to be distrustful, and in what manner they were delivered, which the people might discern to come from misbelief or doubt. (Poole)
it is certain from the text that unbelief was their sin; they were diffident about the will of God to bring water out of the rock for such a rebellious people, and they did not put them in mind of the miracles God had wrought in former time, to encourage their faith; and so the Lord was not sanctified by them before the people, as he ought to have been. (Gill)
There are many thoughts about the sin that Moses and Aaron committed here that led to their banishment from entering the promised land. I think it is hard to understand their sin in the few words given in this scripture. Let us not go deeper than what is given, suffice it for us to know that we must guard our hearts and minds against taking glory away from God in times when it is clearly God who has done great things. He may have used us but the glory is all His, not ours. When we desire to spend time in God’s Word and think about the things of God – this is good and right. When we seek and desire to honor and glorify Jesus Christ in all that we think, say, and do – this is right and good. When we seek to know our sinfulness so that we might know sinfulness and repent of it – this is right and good. When we seek and desire to grow in our understanding and knowledge of God’s grace, mercy, and love – this is right and good.
The problem is that we become complacent, neglectful, and lukewarm to God’s Word and things of God. We speak more of current events, politics, sports, and what’s in the news or social media outlets than things of God. Check your thoughts and speech today and see if there is more content of the worldly or Godly coming from both.