Nehemiah 13:29

Overview - Nehemiah 13
Upon the reading of the law, separation is made from the mixed multitude.
Nehemiah, at his return, causes the chambers to be cleansed.
10 He reforms the offices in the house of God;
15 the violation of the sabbath;
23 and the marriages with the strange wives.
Treasury of Scripture Knowledge

Nehemiah 13:29  (King James Version)
Remember them, O my God, because they have defiled the priesthood, and the covenant of the priesthood, and of the Levites.

6:14 Psalms 59:5-13 ; 2 Timothy 4:14

because they have defiled
Hebrew for the defilings of.
Leviticus 21:1-7

the covenant
Numbers 16:9 Numbers 16:10 ; Numbers 25:12 Numbers 25:13 1 Samuel 2:30 ; Malachi 2:4-8 Malachi 2:10-12