Sayyiduna Jabir (may Allah be pleased with him) narrated: Sayyiduna Abu Isra'il (may Allah be pleased with him) vowed that he would stand in the sun for a whole day, until night fell, and would not speak. So the Prophet (peace and blessings be upon him) ordered him to sit down and to speak.
Imam al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains a narrator, Hajjaj bin Artah, who is a mudallis (one who conceals defects in the chain).