46:11 wa qaalal-ladhiyna kafaruu lil-ladhiyna aamanuu law kaana khayram maa sabaquunaa ilayh* wa idh lam yahtaduu bihii fa sayaquuluuna haadhaa ifkun qadiym

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Ahmed Raza Khan: Mohammed Aqib Qadri:
And the disbelievers said regarding the Muslims, "If there were any good in it, the Muslims would not have surpassed us in achieving it!"; and since they did not receive guidance with it, they will now say, "This is an old slander."

Yusuf Ali:
The Unbelievers say of those who believe: "If (this Message) were a good thing, (such men) would not have gone to it first, before us!" And seeing that they guide not themselves thereby, they will say, "this is an (old,) falsehood!"

Pickthal:
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;