It is narrated from Sayyida Umm Hani bint Abu Talib (may Allah be pleased with her), she says: One day the Messenger of Allah (peace and blessings be upon him) passed by me. I said: O Messenger of Allah! I have become old and weak, so tell me something that I can do while sitting. The Prophet (peace and blessings be upon him) said: Say "Subhan Allah" one hundred (100) times; this act will be equal for you to freeing one hundred (100) slaves from the descendants of Ismail. Say "Alhamdulillah" one hundred (100) times; this act will be equal for you to giving one hundred (100) bridled and saddled horses in the way of Allah. Say "Allahu Akbar" one hundred (100) times; this act will be equal for you to those one hundred (100) camels which are garlanded and sent towards Makkah during the time of Hajj and are accepted by Allah. And say "La ilaha illallah" one hundred (100) times; this act will fill the space between the heavens and the earth with reward. On that day, no man's deed as great as this will be raised upwards, except for one who does the same as you have done.