Pickthall

And if thou (Muhammad) art in doubt concerning that which We reveal unto thee, then question those who read the Scripture (that was) before thee. Verily the Truth from thy Lord hath come unto thee. So be not thou of the waverers.

Sahih International

So if you are in doubt, [O Muhammad], about that which We have revealed to you, then ask those who have been reading the Scripture before you. The truth has certainly come to you from your Lord, so never be among the doubters.

Yusuf Ali

If thou wert in doubt as to what We have revealed unto thee, then ask those who have been reading the Book from before thee: the Truth hath indeed come to thee from thy Lord: so be in no wise of those in doubt.

Dr. Mustafa Khattab, The Clear Quran

If you ˹O Prophet˺ are in doubt about ˹these stories˺ that We have revealed to you, then ask those who read the Scripture before you. The truth has certainly come to you from your Lord, so do not be one of those who doubt,