Al-Mumtahanah 60:11

Wa-in fatakum shay-on min azwajikumila alkuffari faAAaqabtum faatoo allatheenathahabat azwajuhum mithla ma anfaqoo wattaqooAllaha allathee antum bihi mu/minoon

And if you have lost any of your wives to the disbelievers and you subsequently obtain [something], then give those whose wives have gone the equivalent of what they had spent. And fear Allāh, in whom you are believers.

And if some of your (Non-Muslim) wives have slipped from you, (and their present Non-Muslim husbands do not pay to you the dower as aforesaid,) and you have your turn (of paying dower to the previous Non-Muslim husbands of your present wives), then (instead of paying dower to them,) give those whose wives have slipped the like amount of what they had paid (to them). And fear Allah, the One in whom you believe.