Musnad Ahmad Hadith 6575

It is narrated from Ibn Amr (may Allah be pleased with him) that a man came to the service of the Noble Prophet (ﷺ) and said, "O Messenger of Allah! Teach me the Qur'an." The Noble Prophet (ﷺ) said to him: "Recite those three surahs which begin with 'Alif Lam Ra'." The man said, "I am old, my heart has become hard, and my tongue is heavy." The Noble Prophet (ﷺ) said: "Then recite the three surahs which begin with 'Ha Meem'." He repeated his previous statement. The Noble Prophet (ﷺ) advised him to recite the three surahs which begin with 'Sabbih', but he again repeated the same thing and said, "O Messenger of Allah! Teach me a comprehensive surah." The Noble Prophet (ﷺ) taught him Surah Az-Zalzalah. When he finished reciting it, he said, "By Him Who sent you with the truth, I will never add anything to this," and he turned away and left. The Noble Prophet (ﷺ) said about him twice: "This man has succeeded." Then the Noble Prophet (ﷺ) said: "Bring him to me." When he came, the Noble Prophet (ﷺ) said: "I have been commanded to offer sacrifice on the day of Eid al-Adha, and Allah has made this day a day of Eid for this Ummah." The man said, "Tell me, if I do not find any animal except the animal of my son, should I sacrifice that?" The Noble Prophet (ﷺ) said: "No, rather trim your nails, cut your hair, shorten your mustache, and shave the hair below the navel. With Allah, these acts will be considered a complete sacrifice on your behalf."