John Wesley on Deuteronomy 33:22

A lion's whelp - Courageous, and generous, and strong, and successful against his enemies. Which leapeth - From Bashan, because there were many and fierce lions in those parts, whence they used to come forth and leap upon the prey. Or this may refer either to the particular victories obtained by Samson, who was of the tribe of Dan, or to a more general achievement of that tribe, when a party of them surprised Laish, which lay in the farthest part of the land of Canaan from them. And the mountain of Bashan lying not far from that city, from whence they probably made their descent upon it, thus leaping from Basham.