Sahih Muslim 1211 d
The Book of Pilgrimage
Clarifying the types of Ihram; and that it is permissible to perfom Hajj that is Ifrad, Tamattu and Qiran. It is permissible to join Hajj to Umrah. And when the pilgrim who is performing Qiran should exit Ihram
`A'isha (Allah be pleased with her) reported: 'We went with the Messenger of Allah (ﷺ) (to Mecca). He said: He who intended among you to put on Ihram for Hajj and `Umra should do so. And he who intended to put on Ihram for Hajj may do so. And he who intended to put on Ihram for `Umra only may do so. `A'isha (Allah be pleased with her) said: The Messenger of Allah (ﷺ) put on Ihram for Hajj and some people did that along with him. And some people put on Ihram for `Umra and Hajj (both), and some persons put on Ihram for `Umra only, and I was among those who put on Ihram for `Umra (only).