Matthew Poole and continuators on Deuteronomy 33:22

22 And of Dan he said, Dan is a lions whelp : he shall leap from Bashan .

(i. e.) Couragious and generous and strong and successeful against his Enemies.

Or, which leapeth from Bashan: for this clause seems not to belong to the Tribe of Dan, which was at a great distance from Bashan, even at the other end of the Land, and therefore this seems too great a leap for him, and if he did leap so far he should rather be said to take his leap from his own lot in the South of Canaan, and thence to leap not from Bashan, but to Bashan, to fall upon his Enemies there: but it rather is a continuation of the Metaphor, and belongs to the Lion, which is said to leap from Bashan, because there were many and fierce Lions in those parts, see Iudg. 14. 5. whence they used to come forth to prey, and their manner was to leap upon the prey.