Al-An'am 6:53

Wakathalika fatanna baAAdahumbibaAAdin liyaqooloo ahaola-i manna AllahuAAalayhim min baynina alaysa Allahu bi-aAAlama bishshakireen

And thus We have tried some of them through others that they [i.e., the disbelievers] might say, "Is it these whom Allāh has favored among us?" Is not Allāh most knowing of those who are grateful?

Thus We have tested some of them through others, so that they should say, “Are these the ones among all of us whom Allah has chosen for His favour?” Yes, does Allah not know well who are the grateful?