Musnad Ahmad Hadith 18086

It is narrated from Amr bin Khariyah (may Allah be pleased with him) that (in the plain of Mina) the Prophet (ﷺ) delivered a sermon while sitting on his camel (which was chewing cud and its saliva was flowing between my two shoulders) and said: "Be aware, charity is not lawful for me and my family. Then, taking a hair from the shoulder of his camel, he said: Not even equal to this. Upon such a person is the curse of Allah, the angels, and all people who attributes himself to anyone other than his father, or who, leaving his master, forms allegiance with someone else. None of his obligatory or voluntary acts will be accepted. The child belongs to the (owner of the) bed, and for the adulterer is the stone. Allah Almighty has given every rightful person his right, therefore, no bequest can be made in favor of an heir."