Sayyidina Fadl ibn Abbas (RA) narrated that a woman of Bani Kath’am said, 0 Messenger of Allah (SAW) Hajj is fard on my father but he is a very old man unable to sit on the back of a camel.” He said, “You perform Hajj for him.”
[Ahmed3050, Bukhari 1513, Muslim 1334, Abu Dawud 1809, Nisai 2637, Ibn e Majah 2909]