Deuteronomy 33:12

Here is, I. The blessing of Benjamin, Deu 33:12. Benjamin is put next to Levi, because the temple, where the priests' work lay, was just upon the edge of the lot of this tribe; and it is put before Joseph because of the dignity of Jerusalem (part of which was in this tribe) above Samaria, which was in the tribe of Ephraim, and because Benjamin adhered to the house of David, and to the temple of the Lord, when the rest of the tribes deserted both with Jeroboam. 1. Benjamin is here called the beloved of the Lord, and the father of this tribe was Jacob's beloved son, the son of his right hand. Note, Those are blessed indeed that are beloved of the Lord. Saul the first king, and Paul the great apostle, were both of this tribe. 2. He is here assured of the divine protection: he shall dwell safely. Note, Those are safe whom God loves, Psa 91:1. 3. It is here intimated that the temple in which God would dwell should be built in the borders of this tribe. Jerusalem the holy city was in the lot of this tribe (Jos 18:28); and though Zion, the city of David, is supposed to belong to Judah, yet Mount Moriah, on which the temple was built, was in Benjamin's lot. God is therefore said to dwell between his shoulders, because the temple stood on that mount, as the head of a man upon his shoulders.

— Matthew Henry's Concise Commentary (public domain)

of Benjamin he said--A distinguishing favor was conferred on this tribe in having its portion assigned near the temple of God. between his shoulders--that is, on his sides or borders. Mount Zion, on which stood the city of Jerusalem, belonged to Judah; but Mount Moriah, the site of the sacred edifice, lay in the confines of Benjamin.

— Jamieson-Fausset-Brown Commentary (public domain)