Quran Verse
O People of the Scripture! Do not exaggerate in your religion, and do not say about Allah except the truth. The Messiah, Jesus, the son of Mary, is the Messenger of Allah, and His Word that He conveyed to Mary, and a Spirit from Him. So believe in Allah and His messengers, and do not say, “Three.” Refrain—it is better for you. Allah is only one God. Glory be to Him—that He should have a son. To Him belongs everything in the heavens and the earth, and Allah is a sufficient Protector.
[Quran 4:17]
HADITH
....One day Allah's Messenger (Pbuh) stood up to deliver sermon at a watering place known as Khumm situated between Mecca and Medina. He praised Allah, extolled Him and delivered the sermon and. exhorted (us) and said: Now to our purpose. O people, I am a human being. I am about to receive a messenger (the angel of death) from my Lord and I, in response to Allah's call, (would bid good-bye to you), but I am leaving among you two weighty things: the one being the Book of Allah in which there is right guidance and light, so hold fast to the Book of Allah and adhere to it. He exhorted (us) (to hold fast) to the Book of Allah and then said: The second are the members of my household I remind you (of your duties) to the members of my family. He (Husain) said to Zaid: Who are the members of his household? Aren't his wives the members of his family? Thereupon he said: His wives are the members of his family (but here) the members of his family are those for whom acceptance of Zakat is forbidden. And he said: Who are they? Thereupon he said: 'Ali and the offspring of 'Ali, 'Aqil and the offspring of 'Aqil and the offspring of Ja'far and the offspring of 'Abbas. Husain said: These are those for whom the acceptance of Zakat is forbidden. Zaid said: Yes.
[Muslim 2408]