'Strengthen' in the Bible

Then Samson called to the Lord and said, “O Lord God, please remember me and please strengthen me just this one time, O God, and let me take vengeance on the Philistines for my two eyes.”

On the fourth day they got up early in the morning, and the Levite prepared to leave; but the girl’s father said to his son-in-law, “Strengthen yourself with a piece of bread, and afterward go your way.”

On the fifth day he got up early in the morning to leave, but the girl’s father said, “Please strengthen yourself, and wait until the end of the day.” So both of them ate.