Mukhtasar Bukhari

Sayyiduna Abu Dharr Ghifari (may Allah be pleased with him) narrates: We were on a journey with the Prophet (peace and blessings of Allah be upon him). The mu’adhdhin wanted to give the adhan for Zuhr, so the Prophet (peace be upon him) said to him: “Let it cool down.” Then he wanted to give the adhan again, and the Prophet (peace be upon him) said to him: “Let it cool down.” This continued until we saw the shade of the hills. Then the Prophet (peace be upon him) said: “The severity of heat is from the boiling of Hell, so when the heat is intense, perform (the Zuhr) prayer when it cools down.”