A'maal Umm-e-Dawood (Arabic: اعمال ام داوود) are a set of prescribed acts recommended to be performed on the 15th Rajab. The a'mal is named after Umm-e-Dawood (Mother of Dawood), whose real name was Fatima. She was the mother of the great-grandson of Imam Hasan ibn Ali and also served as a wet nurse to Imam Jafar al-Sadiq (as).
Imam Jafar al-Sadiq was once ill and Fatima (Umm-e-Dawood) went to visit him. During her visit, the Imam inquired about his [foster] brother Dawood. Fatima replied that she had lost hope in finding him, for she did not even know whether he was alive or dead. The Imam taught her an a'mal, which is now known as the a'maal of Umm-e-Dawood.
Umm-e-Dawood waited till the 15th of Rajab when she performed the prescribed acts. The subsequent day, a person knocked on her door and it was her son Dawood, who had been released from prison. Dawood narrated to her mother that he was held in a very high security prison with chains on his neck, hands and feet. However, one day the guards came in and took him to Mansur. He ordered the chains to be removed, gave Dawood ten thousand dirhams, and a fast ride to take to him home.
Observe the fasts on the 13th, 14th and 15th of Rajab. On the 15th, perform ghusl at the time when the sun passes the meridian and it is advisable to be in a vacant place so as not to be engaged with anything and not to be addressed by anyone. Offer 8 Rak'at of nafal prayers of Dhur and then offer Dhur. After that, offer a 2 Rak'at prayer and upon completion recite this a 100 times:
يا قاضىَ حَوائِجَ الطّالبينَ
O' the fulfiller of the needs of seekers!
Then offer 8 Rak'at nafal prayers of Asr, offering Asr afterwards. When the prayer is accomplished, one should face the Qibla and recite Surah al-Fatiha 100 times; Surah al-Ikhlas 100 times and Ayat al-Kursi 10 times.
Afterward, recite the following Surahs: Surah al-An'am, Surah al-Isra, Surah al-Kahf, Surah al-Luqman, Surah al-Yaseen, Surah al-Wasaffat, Surah al-Zukhruh, Surah al-Shura, Surah al-Dukhan, Surah al-Fath, Surah al-Waqia, Surah al-Mulk, Surah al-Qalam, Surah al-Inshiqaq and all the Surahs following up to the end of the Holy Qur'an.