Mukhtasar Muslim

Narrated from Umm al-Mu’minin Juwayriya (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) left her place early in the morning after the Fajr prayer, and she was sitting in her place of prayer. Then he (peace and blessings be upon him) returned at the time of Duha and saw that she was still sitting there. He (peace and blessings be upon him) asked, “Have you remained in the same state since I left you?” Juwayriya (may Allah be pleased with her) replied, “Yes.” He (peace and blessings be upon him) said, “After I left you, I recited four phrases three times. If they were to be weighed against what you have recited until now, they would outweigh it. These phrases are: ‘I declare the purity of Allah with His praise, as many times as the number of His creation, as much as pleases Him, as heavy as His Throne, and as much as the ink of His words (meaning, without limit, for there is no end to Allah’s words; if the sea were ink, it would be exhausted, but Allah’s words would not be finished).’”

In another narration from Sayyidah Juwayriya (may Allah be pleased with her), the words are: “Purity is for Allah as many times as the number of His creation, purity is for Allah as much as pleases Him, purity is for Allah as heavy as His Throne, and purity is for Allah as much as the ink of His words.”

Abu Huraira (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings of Allah be upon him) said: Whoever says "Subhan Allah wa bihamdihi" one hundred times in the morning and in the evening, no one will come on the Day of Resurrection with a deed better than his, except one who says as much or more than this.