1. An example from the Old Testament. King Solomon just finish building the first Temple for God, and the nation of Israel gathered to celebrate the installation of the Ark of the Covenant within the Holy of Holies. Standing before the Altar of God, king Solomon prays for the nation and part of his prayer involves confession. What does the king tell the nation to acknowledge?

"When Your people Israel are defeated before an enemy, because they have sinned against You, if they turn to You again and confess Your name and pray and make supplication to You in this house, then listen in heaven, and forgive the sin of Your people Israel, and bring them back to the land which You gave to their fathers. When the heavens are shut up and there is no rain, because they have sinned against You, and they pray toward this place and confess Your name and turn from their sin when You afflict them, then listen in heaven and forgive the sin of Your slaves and of Your people Israel; indeed, teach them the good way in which they should walk. And give rain on Your land, which You have given to Your people for an inheritance." (1 Ki 8:33-36, LSB)

2. An example from the New Testament. As the apostle Paul writes to the Church of Rome, what does he tell them to acknowledge?

But what does it say? "The word is near you, in your mouth and in your heart"—that is, the word of faith which we are preaching, that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved; for with the heart a person believes, leading to righteousness, and with the mouth he confesses, leading to salvation. For the Scripture says, "Whoever believes upon Him will not be put to shame." For there is no distinction between Jew and Greek, for the same Lord is Lord of all, abounding in riches for all who call on Him, for "Whoever calls on the name of the Lord will be saved." (Rom 10:8-13, LSB)