It is narrated from Sayyiduna Uwaym bin Sa'idah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed Allah, the Mighty and Majestic, chose me and chose Companions for me, and from among them He made for me ministers, helpers and in-laws. So whoever reviles them, upon him is the curse of Allah, of the angels and of all people; on the Day of Resurrection neither an obligatory nor a voluntary deed will be accepted from him." This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.