After washing his hands before a meal, he is to stretch out his fingers
and turn the palms of his hands upward, as if in the act of receiving
something from a friend, and then repeat (Ps. cxxxiv. 2), "Lift ye up
your holy hands, and bless ye the Lord!"
THE KABBALA, _Kitzur Sh'lh_, fol. 17, col. 2.