'Believe in the Lord' in the Bible

Notwithstanding they would not hear, but hardened their necks, like to the neck of their fathers, that did not believe in the LORD their God.

And they rose early in the morning, and went forth into the wilderness of Tekoa: and as they went forth, Jehoshaphat stood and said, Hear me, O Judah, and ye inhabitants of Jerusalem; Believe in the LORD your God, so shall ye be established; believe his prophets, so shall ye prosper.

This became known all through Jaffa, and numbers of People came to believe in the Lord.

And they answered, “Believe in the Lord Jesus [as your personal Savior and entrust yourself to Him] and you will be saved, you and your household [if they also believe].”

and Crispus, the ruler of the synagogue did believe in the Lord with all his house, and many of the Corinthians hearing were believing, and they were being baptized.