It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that once the Holy Prophet (peace and blessings be upon him) went to Hazrat Ubayy bin Ka'b (may Allah be pleased with him) while he was praying. The Holy Prophet (peace and blessings be upon him) called him by his name. He turned his attention for a moment but did not reply, and after shortening his prayer and finishing it, he came to the service of the Holy Prophet (peace and blessings be upon him) and said, "Peace be upon you, O Messenger of Allah." The Holy Prophet (peace and blessings be upon him) replied to him and said, "Ubayy, when I called you, what prevented you from answering me?" He submitted, "O Messenger of Allah (peace and blessings be upon him), I was in prayer." The Holy Prophet (peace and blessings be upon him) said, "Allah has revealed to me a revelation. Have you not read this verse: 'When Allah and His Messenger call you to that which gives you life, then respond to their call'?" He submitted, "O Messenger of Allah (peace and blessings be upon him), why not, I will not do so again." Then the Holy Prophet (peace and blessings be upon him) said, "Do you wish that I teach you a surah the like of which has not been revealed in the Torah, the Psalms, the Gospel, nor even in the Qur'an itself?" I submitted, "Certainly, O Messenger of Allah (peace and blessings be upon him)!" The Holy Prophet (peace and blessings be upon him) said, "I hope that you will not leave this door before you have learned it." After that, the Holy Prophet (peace and blessings be upon him) took my hand and began to talk to me. Fearing that the conversation might end before the Holy Prophet (peace and blessings be upon him) reached the door, I began to walk slowly. When we reached near the door, I submitted, "O Messenger of Allah (peace and blessings be upon him), which is that surah which you promised to teach me?" The Holy Prophet (peace and blessings be upon him) said, "What do you recite in prayer?" I recited Surah Al-Fatiha. The Holy Prophet (peace and blessings be upon him) said, "By Him in Whose hand is my soul, Allah has not revealed a surah like it in the Torah, the Psalms, the Gospel, nor even in the Qur'an itself, and this is the 'Seven Oft-Repeated Verses' (Sab‘ al-Mathani)."