'Come in Peace' in the Bible

Samuel did what the Lord directed and went to Bethlehem. When the elders of the town met him, they trembled and asked, “Do you come in peace?”

David went out to meet them and said to them, “If you have come in peace to help me, my heart will be united with you, but if you have come to betray me to my enemies even though my hands have done no wrong, may the God of our ancestors look on it and judge.”