Al-An'am 6:19

Qul ayyu shay-in akbaru shahadatanquli Allahu shaheedun baynee wabaynakum waoohiyailayya hatha alqur-anu li-onthirakum bihiwaman balagha a-innakum latashhadoona anna maAAa Allahi alihatanokhra qul la ashhadu qul innama huwa ilahunwahidun wa-innanee baree-on mimma tushrikoon

Say, "What thing is greatest in testimony?" Say, "Allāh is witness between me and you. And this Qur’ān was revealed to me that I may warn you thereby and whomever it reaches. Do you [truly] testify that with Allāh there are other deities?" Say, "I will not testify [with you]." Say, "Indeed, He is but one God, and indeed, I am free of what you associate [with Him]."

Say, “Whose testimony is the greatest?” Say, “Allah is the witness between me and you, and this Qur’ān has been revealed to me so that I should thereby warn you, and whomsoever it may reach. Do you really bear witness that there are other gods along with Allah?” Say, “I bear no such witness.” Say, “In fact, He is one God. I disown what you associate (with Him).”