Yusuf Ali
So leave them alone until they encounter that Day of theirs, wherein they shall (perforce) swoon (with terror),-

Sahih International
So leave them until they meet their Day in which they will be struck insensible -

Shakir
Leave them then till they meet that day of theirs wherein they shall be made to swoon (with terror):

Pickthall
Then let them be (O Muhammad), till they meet their day, in which they will be thunder-stricken,

محمد جالندھری
پس ان کو چھوڑ دو یہاں تک کہ وہ روز جس میں وہ بےہوش کردیئے جائیں گے، سامنے آجائے