his hand: or, as the Greek has it, "his hands", Menachem gives reason why it is written hand, to signify the right hand, because that was lifted up higher than the left. The lifting up of the hand was a gesture used in speaking, and signifying any weighty thing, Isaiah 49:22; and particularly in swearing, Genesis 14:22; praying, Psalms 28:2; and blessing, either of God, Psalms 134:2, or of men, as in this place.
Paul, speaking of prayer, uses the phrase, "lifting up holy hands;" as also David: "Let the lifting up of my hands be as the evening sacrifice."