'Promise' in the Bible

So Gideon asked him, "Please, if I have received favor from you, then do a miracle for me that shows that you're making this promise to me.

They responded, "We've come here to arrest you and transfer you to the custody of the Philistines." Samson told them, "Promise me that you won't kill me."

They said to him, "We promise! We will only take you prisoner and hand you over to them. We promise not to kill you." They tied him up with two brand new ropes and led him up from the cliff.