Bible Verses About Oaths: Binding to performance of sacred duties

when a man makes a vow to ADONAI or formally obligates himself by swearing an oath, he is not to break his word but is to do everything he said he would do.

They swore this to ADONAI in a loud voice, with shouting and blowing of trumpets and shofars.

All Y'hudah was full of joy at this oath; for they had sworn with all their heart and had sought him with all their will; and they found him, and ADONAI gave them rest all around.

joined their kinsmen and their leaders in swearing an oath, accompanied by a curse [in case of noncompliance], as follows: "We will live by God's Torah, given by Moshe the servant of God, and will perform and obey all the mitzvot, rulings and laws of ADONAI our Lord.

how he swore to ADONAI, vowed to the Mighty One of Ya'akov,