Amr bin Qays relates that he heard Sayyiduna Mu'awiyah bin Abi Sufyan (may Allah be pleased with him) recite this verse on the pulpit: "This day I have perfected for you your religion" [Al-Ma'idah: 3], until he completed the verse, and he said: This verse was revealed on the day of Arafah, on a Friday. Then he recited this verse: "So whoever hopes for the meeting with his Lord, let him do righteous deeds and not associate anyone in the worship of his Lord" [Al-Kahf: 110], and he said: This is the last verse to be revealed.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16970