Yunus 10:94

Fa-in kunta fee shakkin mimma anzalnnailayka fas-ali allatheena yaqraoona alkitabamin qablika laqad jaaka alhaqqu min rabbika falatakoonanna mina almumtareen

So if you are in doubt, [O Muḥammad], 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.

So, (O prophet,) even if you are in doubt about what We have sent down to you, ask those who read the Book (revealed) before you. Surely, truth has come to you from your Lord, so never be among those who are suspicious.