1st Aliyah

Shortly before he passed away. Moses blessed the Tribes of Israel individually. Moses prefaced his blessings with praise for G‑d — how He descended from Heaven amidst myriads of angels to give His people the Torah on Mount Sinai — and praise for the Israelites — how they lovingly and unconditionally accepted G‑d's gift. Reuben and Judah were the first two tribes to be blessed: Reuben with life in this world and the next one; Judah with success and victory in the course of his battles.

2nd Aliyah

The holy tribe of Levi was next in line to be blessed. Moses extols their virtues, the only tribe to remain faithful to G‑d throughout the various trials and tests the Israelites encountered during their desert sojourn. Therefore, Moses declares, "They will teach Your laws to Jacob and Your Torah to Israel; they will place incense before You, and burnt-offerings upon Your altar." Benjamin, then, is acknowledged as "G‑d's beloved," the tribe which will be graced by the Holy Temple which will be situated in its portion of Israel.

Source: Chabad.org