The Quran

إِن تَكفُروا فَإِنَّ اللَّهَ غَنِيٌّ عَنكُم ۖ وَلا يَرضىٰ لِعِبادِهِ الكُفرَ ۖ وَإِن تَشكُروا يَرضَهُ لَكُم ۗ وَلا تَزِرُ وازِرَةٌ وِزرَ أُخرىٰ ۗ ثُمَّ إِلىٰ رَبِّكُم مَرجِعُكُم فَيُنَبِّئُكُم بِما كُنتُم تَعمَلونَ ۚ إِنَّهُ عَليمٌ بِذاتِ الصُّدورِ

Muhammad Asad

If you are ingrate¹ - behold, God has no need of you; none the less, He does not approve of ingratitude in His servants: whereas, if you show gratitude, He approves it in you. And no bearer of burdens shall be made to bear another's burden.² In time, unto your Sustainer you all must return, and then He will make you [truly] understand all that you were doing [in life]: for, verily, He has full knowledge of what is in the hearts [of men].

Or: "If you deny the truth".
This statement occurs in the Qur'an five times in exactly the same formulation (apart from the above instance, in 6:164, 17:15, 35:18 and 53:38 - this last being the earliest in the chronology of revelation). In the present instance, it contains an allusion to (and rejection of) the Christian doctrine of "vicarious atonment" and, indirectly, to the worship of saints, etc., spoken of in verse 3 above and referred to in note 1. (See also note 31 on 53:38.)