'Dismissed' in the Bible

Abner said to David, “Let me now go and I will gather all Israel to my lord the king. They will make a covenant with you, and you will rule over all you desire.” So David dismissed Abner, and he went in peace.

Just then David’s soldiers and Joab returned from a raid and brought a large amount of plundered goods with them. Abner was not with David in Hebron because David had dismissed him, and he had gone in peace.

When Joab and all his army arrived, Joab was informed, “Abner son of Ner came to see the king, the king dismissed him, and he went in peace.”

Then Joab came to the king and said, "What have you done? Abner came here to you? Why have you dismissed him that he {actually went away}?