Does cursing Allah in anger affect the validity of a nikah?

Assalam o Alaikum, I have a case which I don’t know whom to ask my husband cursed Allah in anger as we are going through financial difficulties, I asked him to seek forgiveness as saying that is kufr, he said those words loud in front of me, do you think it would have any impact of our Nikkah as I haven’t heard him saying for any forgiveness from Allah. And if he does want to seek forgiveness from Allah what would be the status of our nikah. Please enlighten me. Thank you