Muhammad ibn Ali ibn Mahbub, from Muhammad ibn Ahmad al-‘Alawi, from al-‘Amraki al-Bufaki, from Ali ibn Ja’far, from his brother Imam Musa عليه السلام, peace be upon him, who said: I asked Imam al-Kadhim عليه السلام about a man who made a vow to Allah سبحانه وتعالى upon himself, to perform such-and-such number of prayers. Does it suffice him to perform that while on his riding animal and he is traveling? Imam عليه السلام said: “Yes.”