Yahya related to me from Malik from Abd ar-Rahman ibn Qasim from his father that when people went to stone the jamras they would walk both going there and coming back. The first one to ride was Muawiya ibn Abi Sufyan.
Muwatta Malik Book 20, Hadith 227
← Previous Hadith Yahya related to me from Malik that he had heard some of the people of knowledge saying, "The pebbles used for stoning the jamras should be like the stones used as slingshot."

Malik said, "I like it better if they are a little larger than that."

Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to say, "Someone who is at Mina when the sun sets in the middle of the days of tashriq must not leave until he has stoned the jamras on the following day."

Muwatta Malik Book 20, Hadith 226 Next Hadith → Yahya related to me from Malik that he asked Abd ar-Rahman ibn Qasim, "From where did Qasim stonethe jamrat al-Aqaba?"and he replied, "From wherever it was possible."

Yahya said that Malik was asked whether some one else could throw the stones for a child or a sick man and he said, "Yes, and a sick man should inquire as to when the stones will be thrown for him and then say the takbir while he is in the place where he is staying, bleeding. If a sick man regains his health during the days of tashriq, he should stone whatever stoning has been done for him and he must offer a sacrificial animal."

Malik said, "I do not consider that someone who stones the jamras or does say between Safa and Marwa without being in wudu has to repeat anything, but he should not make a general practice of it."

Muwatta Malik Book 20, Hadith 228