Yahya bin Abi Kathir يحيى بن أبي كثير الطائي · Chapters on Hajj Rituals

It was narrated from Ibn ‘Umar that when the Messenger of Allah (ﷺ) put his foot in the stirrup and his riding beast rose up with him, he would say the Talbiyah from the mosque of Dhul-Hulaifah.

It was narrated from ‘Aishah that the Messenger of Allah (ﷺ) performed Hajj Ifrad.*

“Hajj is Jihad and ‘Umrah is voluntary.”