Al-Ahqaf 46:11

The disbelievers say about the believers, “If this [faith] were something good, they[7] would not have believed in it before us.” Now since they are not guided by it, they will say, “This is an old fabrication.”

[7] These poor and powerless individuals and slaves who embraced Islam.

And those who disbelieve say of those who believe, "If it had [truly] been good, they would not have preceded us to it." And when they are not guided by it, they will say, "This is an ancient falsehood."

11. And those who disbelieve (the strong and wealthy) say of those who believe (the weak and poor): "Had it (Islâmic Monotheism to which Muhammad صلى الله عليه وسلم is inviting mankind) been a good thing, they (the weak and poor) would not have preceded us thereto!" And when they have not let themselves be guided by it (this Qur’ân), they say: "This is an ancient lie!"

And those who disbelieve say of those who believe: If it had been (any) good, they would not have been before us in attaining it. And since they will not be guided by it, they say: This is an ancient lie;