Hadith of the two weighty things went to Zayd b.Arqam, one of the transmitters of the standard Ghadir Khumm. Zayd said to them that he has "forgotten some [of what he had heard from the prophet]" but he began to recite Hadith al-Thaqalayn for them as words that heard from prophet in The event of Ghadir Khumm. As the Allameh Tabataba'i said, some points can be driven from this hadith such as "the Holy Quran will remain until the day of Judgment, the progeny of the Mohammad prophet will remain". There will be any period of time that Shia Imam doesn't exist to guide Muslims. All
Hadith "the documentation" of the Sunnah. Another source (Joseph A. Islam) distinguishes between the two saying: Whereas the 'Hadith' is an oral communication that is allegedly derived from the Prophet or his teachings, the 'Sunna' (quite literally: mode of life, behaviour or example) signifies the prevailing customs of a particular community or people. ... A 'Sunna' is a practice which has been passed on by a community from generation to generation en masse, whereas the Ahadith are reports collected by later compilers often centuries removed from the source. ... A practice which is contained within the Hadith may well be regarded