Translation of the verse 40 from Surah Al-Qalam : Number of verses 52 - - page 565 - Part 29.
Ask them, which of them will stand surety for that!
Ask them which of them, for that [claim], is responsible.
(68:40) Ask them: 'Which of them can guarantee that? *22
*22) Za'im in Arabic is used for a person who stands a surety on behalf of another, or is a spokesman of others. Thus, the verse means to ask: "Which of you will come forward and say that he has made such and such a covenant with Allah on your behalf?"
Source : Al-Qalam Verse 40: Ask them which of them, for that [claim], is responsible.