'Oaths' in the Bible

I have a feast of peace-offerings, for today my oaths have been effected.

It is a danger to a man to say without thought, It is holy, and, after taking his oaths, to be questioning if it is necessary to keep them.

What am I to say to you, O Lemuel, my oldest son? and what, O son of my body? and what, O son of my oaths?