Matthew Poole and continuators on Nehemiah 13:29

29 Remember them, O my God, because they have defiled the priesthood, and the covenant of the priesthood , and of the Levites.

That Covenant made between me and his Progenitors for themselves and their Posterity, whereby I promised to give them an everlasting Priesthood, Numb. 25. 12, 13. and they covenanted with me that they would faithfully and holily execute that sacred Function according to the rules which I gave them whereby among other things, they were enjoyned to keep themselves pure from all unlawful marriages; and from all other things which might pollute them, or the Priesthood.

Marginal references: Heb, for the defilings.; Mal. 2. 4.