The ruling on someone who is able to stone the Pillars appointing someone else to do it for him

Question :

Is it possible for me to appoint someone for myself to stone the pillars on the second day of At-Tashreeq due to family reasons that necessitate my return to Ar-Riyadh on that day, or do I have to slaughter an animal for that?

Answer:

It is not permissible for anyone to appoint someone else and travel before completing the stoning. Rather, it is obligatory upon him to wait. If he is able, he must throw the stones himself, and if he is not able he may wait and appoint someone to do it for him. The person should not travel until his appointed representative finishes stoning the pillars. Then, this person who appointed someone else to throw, performs the Farewell Tawaf of the House (the Ka'bah) and after that he may travel.

However, if he is healthy, he may not appoint someone else. Rather, it is obligatory upon him to throw the stones himself, because when he assumed Ihram for Hajj, it became obligatory upon him to complete it. This is as Allâh said:
"And complete the Hajj and the 'Umrah for Allah."

The same applies to the 'Umrah, as this noble Verse mentions, if the person starts it, he must finish it and complete it. He may not appoint someone to do some of the acts of Hajj, according to the correct view, as long as he is able to do them himself. If he travels before stoning, he must sacrifice an animal and feed the meat to the poor people of Makkah.

Source:
Ash-Shaykh Ibn Baz
Fatawa Islamiyah, Vol. 4 Pages 163-164