1 Cor. 7:12 But to the rest I, not the Lord, say: if any brother has a wife who does not believe, and he is willing to live with her, let him not divorce her.
7: 13 And awoman who has a husband who does not believe, if he is willing to live with her, let her not divorce him.
7: 14 For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband; otherwise your children would be unclean, but now they are holy.
NKJV
Supose a man and woman were married in a Bhudhist ceremony, and one of them converts to Christ, does God reconize the validity of that marriage?