First, the person speaking has changed. In the previous verses, the Lord of hosts has been speaking directly to his people through the prophet. But in Malachi 2:10–15 it is the prophet Malachi who speaks. Second, the topic has changed. In Malachi 2:10–16 the matter of marital unfaithfulness is being addressed.
10 N'avons-nous pas tous un seul père? N'est-ce pas un seul Dieu qui nous a créés? Pourquoi donc sommes-nous infidèles l'un envers l'autre, En profanant l'alliance de nos pères?