Al-Husayn, from Fadalah, from al-Husayn ibn Uthman, from Samaah, from Abu Basir, who said: I (narrator) asked Abu Abdillah عليه السلام, peace be upon him, about ‘the voluntary fasting person when a need arises for him.’ Imam عليه السلام said: “He has the choice between himself and the afternoon prayer (Asr), and if he remains until the afternoon prayer (Asr), then it appears to him that he should fast, while he had not intended that, then he may fast that day if he wishes.”