Silsilat al-Ahadith al-Sahihah

Sayyidah Umm Hani bint Abi Talib (may Allah be pleased with her) narrates that 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 an action that I can do while sitting. The Prophet (peace and blessings be upon him) said: "Say «سبحان الله» one hundred times; this remembrance is better for you than one hundred slaves from the descendants of Isma'il (peace be upon him) whom you set free. Say «الحمد لله» one hundred times; this remembrance is better for you than one hundred saddled and bridled horses that you give in charity in the way of Allah. Say «الله اكبر» one hundred times; this remembrance is better for you than one hundred camels with necklaces, accepted by Allah, that are slaughtered in Makkah. Say «لا اله الا الله» one hundred times; this remembrance will fill the space between the heavens and the earth (with reward), and on that day, no one will have any deed that rises up to the heavens better than this, except for a person who does the same as you do."