Before the Lord; solemnly, as in God's presence, in his name, and by his authority, and with his leave and favour, which I shall heartily pray for thee. So he signifies that this was more than an ordinary blessing which he now intended to give him.
Related Commentaries of Genesis 27:7
Genesis 27:7
7 Bring me venison, and make me savoury meat, that I may eat, and bless thee before the LORD before my death.