What is Hadith of warning?

The hadith of warning , also known as the invitation of the close families of Muhammad , is an Islamic tradition that describes how the Islamic prophet Muhammad declared his prophetic mission for the first time by inviting his relatives to Islam. There are two versions of this hadith, both of which are linked to verse 26:214 of the Quran, known also as the Verse of Ashira. In one version, Muhammad's young cousin Ali is the only relative who offers his assistance to Muhammad, who then announces Ali as his successor, as reported by al-Tabari.