Chapter on Times of Prayer and Sign of Each of Its Times

Sa’d narrated from Ahmad ibn Muhammad, from Muhammad ibn Abd al-Jabbar, from al-Hasan ibn Ali ibn Faddal, from Abdillah ibn Bukayr, from Zurarah, who said: I asked Abu Abdillah عليه السلام about the time of the Dhuhr prayer during intense heat, but He عليه السلام did not answer me. Then, sometime afterward, Imam عليه السلام said to ‘Amr ibn Sa’id ibn Hilal: “Zurarah asked me about the time of the Dhuhr prayer during intense heat, and I did not inform him, and I felt uneasy about that. So convey my greetings to him and say to him: ‘When your shadow becomes equal to your height, then pray Dhuhr; and when your shadow becomes twice your height, then pray ‘Asr.’”