מלכים ב י:טו פירוש: רש״י

And said to him. [I.e.,] Yeihu [said to him].

“Is your heart upright.” Wholehearted in what I am doing, as I am wholeheartedly with your heart?

And Yehonodov said, “It sure is, give me your hand.” And hold it and take me up to you, to the chariot.⁷I.e., to Yeihu’s chariot. Alternatively, “Give me your hand” was spoken by Yeihu who then pulled Yehonodov up into his chariot.—Radak Or, he asked for a handshake as a gesture to confirm their amicable relationship.—Metzudas Dovid