68:40

سَلْهُمْ أَيُّهُم بِذَٰلِكَ زَعِيمٌ

Transliteration:

Salhum ayyuhum bithalika zaAAeemun

Word by Word:

Ask them, which of them for that (is) responsible.

Translations:

Ask them which of them is able to vouch for this!

Ask thou of them, which of them will stand surety for that!

Ask them (O Muhammad) which of them will vouch for that!

Ask them which of them will vouch for that.

Ask them which of them, for that [claim], is responsible.