As the value of a document is attested by its concluding words, the signature of the witnesses, so Isaac confirmed the blessing he had bestowed upon Jacob. That none might say Jacob had secured it by intrigue and cunning, he blessed him again with three blessings, in these words, "In so far as I am endowed with the power of blessing, I bestow blessing upon thee. May God, with whom there is endless blessing, give thee His, and also the blessing wherewith Abraham desired to bless me, desisting only in order not to provoke the jealousy of Ishmael."