Maleakhi 2:14

2:14 Yet you ask, “Why?” The Lord is testifying against you on behalf of the wife you married when you were young, ¹  to whom you have become unfaithful even though she is your companion and wife by law. ² 

Maleakhi 2:17

Resistance to the Lord through Self-deceit

2:17 You have wearied the Lord with your words. But you say, “How have we wearied him?” Because you say, “Everyone who does evil is good in the Lord’s opinion, ³  and he delights in them,” or “Where is the God of justice?”

[2:14]  ¹ tn Heb “the Lord is a witness between you and [between] the wife of your youth.”

[2:14]  ² sn Though there is no explicit reference to marriage vows in the OT (but see Job 7:13; Prov 2:17; Ezek 16:8), the term law (Heb “covenant”) here asserts that such vows or agreements must have existed. References to divorce documents (e.g., Deut 24:1-3; Jer 3:8) also presuppose the existence of marriage documents.

[2:17]  ³ tn Heb “in the eyes of the Lord.”