'Entered into a Covenant' in the Bible

And they entered into a covenant to seek the LORD God of their fathers with all their heart and with all their soul;

Now when I passed by you, and looked upon you, behold, your time was the time of love; and I spread my skirt over you, and covered your nakedness: yea, I swore unto you, and entered into a covenant with you, says the Lord GOD, and you became mine.