Ja`far b. Muhammad b. Masrur narrated to us. He said: Al-Husayn b. Muhammad b. `Amer narrated to us from his uncle `Abdullah b. `Amer from Muhammad b. Abi `Umayr from Abi Harun al-Makfuf from Abi `Abdillah al-Sadiq . He said:

O Aba Harun! Surely, we instruct our children to recite Tasbih Fatima just as we instruct them to pray. So, cling to it, for no wretched worshiper clings to it.