Accepting Islam

Hazrat ‘Ali (radhiyallahu ‘anhu) accepted Islam the day after Rasulullah (sallallahu ‘alaihi wasallam) received prophethood. Rasulullah (sallallahu ‘alaihi wasallam) was blessed with prophethood on a Monday and Hazrat ‘Ali (radhiyallahu ‘anhu) accepted Islam on a Tuesday. (Usdul Ghaabah 3/283)

After Rasulullah (sallallahu ‘alaihi wasallam) was blessed with prophethood, Hazrat Jibreel (‘alaihis salaam) taught Rasulullah (sallallahu ‘alaihi wasallam) how to perform wudhu and salaah. After performing wudhu and two rakaats of salaah, Rasulullah (sallallahu ‘alaihi wasallam) returned home and taught his respected wife, Hazrat Khadeejah (radhiyallahu ‘anha), how to perform wudhu and salaah. She thus made wudhu and performed salaah with Rasulullah (sallallahu ‘alaihi wasallam). This was on Monday evening. (‘Uyoon-ul-Athar 1/109, Al-Bidaayah Wan-Nihaayah 4/60, Isaabah 8/100, Seerat-ul-Mustafa 1/153 & 1/155)