C. F. Keil and Franz Delitzsch on Genesis 49:27

Gen 49:27 “Benjamin - a world, which tears in pieces; in the morning he devours prey, and in the evening he divides spoil.” Morning and evening together suggest the idea of incessant and victorious capture of booty (Del.). The warlike character which the patriarch here attributes to Benjamin, was manifested by that tribe, not only in the war which he waged with all the tribes on account of their wickedness in Gibeah (Judg 20), but on other occasions also (Jdg 5:14), in its distinguished archers and slingers (Jdg 20:16; 1Ch 8:40, 1Ch 8:12; 2Ch 14:8; 2Ch 17:17), and also in the fact that the judge Ehud (Jdg 3:15.), and Saul, with his heroic son Jonathan, sprang from this tribe (1Sa 11:1-15 and 13; 2Sa 1:19.).