Deuteronomy 10:8

10:8 At that time the Lord set apart the tribe of Levi ¹  to carry the ark of the Lord’s covenant, to stand before the Lord to serve him, and to formulate blessings ²  in his name, as they do to this very day.

Deuteronomy 15:18

15:18 You should not consider it difficult to let him go free, for he will have served you for six years, twice ³  the time of a hired worker; the Lord your God will bless you in everything you do.

[10:8]  ¹ sn The Lord set apart the tribe of Levi. This was not the initial commissioning of the tribe of Levi to this ministry (cf. Num 3:11-13; 8:12-26), but with Aaron’s death it seemed appropriate to Moses to reiterate Levi’s responsibilities. There is no reference in the Book of Numbers to this having been done, but the account of Eleazar’s succession to the priesthood there (Num 20:25-28) would provide a setting for this to have occurred.

[10:8]  ² sn To formulate blessings. The most famous example of this is the priestly “blessing formula” of Num 6:24-26.

[15:18]  ³ tn The Hebrew term מִשְׁנֶה (mishneh, “twice”) could mean “equivalent to” (cf. NRSV) or, more likely, “double” (cf. NAB, NIV, NLT). The idea is that a hired worker would put in only so many hours per day whereas a bondslave was available around the clock.