Ahle Bayt
Ahle Bayt or Ahl al Bayt (literally 'people of the house') refers to the family of the Prophet Muhammad (SAWW).
The term is limited to the Holy Prophet Muhammad (SAWW), his daughter Lady Fatima al-Zahra (SA), his cousin and son-in-law Ali ibn Abi Talib (AS), their two sons, Ḥasan (AS) and Hussain (AS) and their descendants.
Allah swt says in the Holy Quran (33:33)
"Indeed Allah desires to repel all impurity from only you, Ahl al-Bayt (People of the Household), and purify you with a thorough purification."
This cleansing of Ahl al-Bayt (a) from impurities means "infallibility from sins and having the opportunity of obedience."
A widely reported tradition of the Holy Prophet is where he informs believers:
"Indeed I am leaving two things among you, to which if you hold yourself, you will never astray: the book of Allah –who is all Mighty and Great- and my Ahl al-Bayt (household), my 'itra (family). O people hear! And I have announced to you that: indeed you will enter my presence and I will ask you about what you did to the thaqalayn (two weighty things) and the thaqalayn are the book of Allah and my Ahl al-Bayt."