Leviticus 9:22

SE⁽ⁱ⁾ ²² Después alzó Aarón sus manos hacia el pueblo y los bendijo; y descendió de hacer la expiación, y el holocausto, y el sacrificio de la paz.

Online Parallel Study Bible

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, Isa 49:22; and particularly in swearing, Ge 14:22; praying, Ps 28:2; and blessing, either of God, Ps 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."
Genesis 14:18-20; Numbers 6:23-27; Deuteronomy 10:8; Deuteronomy 21:5; 1 Kings 8:55; 1 Chronicles 23:13
2 Chronicles 6:3; Psalms 72:17; Mark 10:16; Luke 24:50; Acts 3:26; 2 Corinthians 13:14
Hebrews 7:6; Hebrews 7:7; 1 Peter 3:9