Charles Spurgeon Commentary Deuteronomy 33:19-22

"They shall call the peoples unto the mountain; There shall they offer sacrifices of righteousness: For they shall suck the abundance of the seas, And the hidden treasures of the sand. And of Gad he said, Blessed be he that enlargeth Gad: He dwelleth as a lioness, And teareth the arm, yea, the crown of the head. And he provided the first part for himself, For there was the lawgiver`s portion reserved; And he came [with] the heads of the people; He executed the righteousness of Jehovah, And his ordinances with Israel. And of Dan he said, Dan is a lion`s whelp, That leapeth forth from Bashan." — Deuteronomy 33:19-22 (ASV)

And of Gad, he said, Blessed be he that enlargeth Gad. God knows how to enlarge his people, give them more grace, more gifts, more opportunities of usefulness. Which he did. His tribes enlarged their boundaries by a sudden leap. God gives his people sometimes their leaping times; they leap from Bashan: some great purpose is accomplished, some great feat is done.