'Right hand' in the Bible

And the king said, Is not the hand of Joab with you in all this? And the woman in answer said, By the life of your soul, my lord the king, it is not possible for anyone to go to the right hand or to the left from anything said by the king: your servant Joab gave me orders, and put all these words in my mouth:

And he sent stones at David and at all the king's servants and at all the people and at all the men of war by his side, on the right hand and on the left.

And Joab said to Amasa, Is it well, my brother? And with his right hand he took him by the hair of his chin to give him a kiss.