Sayyidunā Suwayd ibn Ghafalah radhiyallāhu 'anhu narrates that when Sayyidunā 'Alī radhiyallāhu 'anhu was suffering extreme hunger one day, he suggested to (his wife) Sayyidah Fātimah radhiyallāhu 'anhā to approach (her father) Rasūlullāh sallallāhu 'alayhi wasallam for some food. When she went to Rasūlullāh sallallāhu 'alayhi wasallam, Sayyidah Ummu Ayman radhiyallāhu 'anhā happened to be there. Hearing Sayyidah Fātimah knocking on the door, Rasūlullāh sallallāhu 'alayhi wasallam said, "That is the knock of Fātimah. She has come at a time that we are not accustomed to having her come to us."
"O Rasūlullāh sallallāhu 'alayhi wasallam!" Sayyidah Fātimah radhiyallāhu 'anhā said, "The food of the angels is to recite Lā Ilāha Illallāh, Subhānallāh and Alhamdulillāh. What is our food?"
Rasūlullāh sallallāhu 'alayhi wasallam replied. "I swear by the Being Who has sent me with the truth! For the last thirty days, no fire (to cook) has been lit in the house of the family of Muhammad. However, a few goats have come to us. If you please, I shall have five given to you. Alternatively, if you so please, I shall teach you five words (of supplication) that Jibra'īl 'alayhis salām has taught me."
Sayyidah Fātimah radhiyallāhu 'anhā immediately said, "Do rather teach me the five words that Jibra'īl 'alayhis salām has taught you." Rasūlullāh sallallāhu 'alayhi wasallam then told her to say the following words:
Sayyidah Fātimah radhiyallāhu 'anhā then left. When she came back to Sayyidunā 'Alī radhiyallāhu 'anhu, he asked, "What happened?" She replied, "While I left you to get something of benefit in this world, I returned with something of benefit in the Ākhirah." "This is the best of all your days," remarked Sayyidunā 'Alī radhiyallāhu 'anhu. (At-Tabarānī)