Assalamu alaikum wa rahmatullahi wa barakatuhu!
In the Name of Allah, Most Gracious, Most Merciful
Hazrat Ali (ra) once said to one of his pupils:
"Shall I tell you the story of Hazrat Fatima (ra), the dearest and most loved daughter of the Prophet Muhammad (saw)?"
When the pupil replied in the affirmative, he said:
"Hazrat Fatima (ra) used to grind the grain herself, which caused blisters on her hands. She carried water for the house in a leather bag, which left a mark on her chest. She cleaned the house herself, which made her clothes dirty.
Once, some war captives were brought to Madinah. I said to her, "Go to the Prophet (saw), and request him for an assistant to help you in your housework".
She went to him, but found many people around him. As she was very modest, she could not be bold enough to request the Prophet (saw) in the presence of other people.
Next day, the Prophet (saw) came to our house and said, "Fatima! What made you come to me yesterday?"
She felt shy and kept quiet.
I said, "O Prophet (saw) of Allah! Fatima has developed calluses on both her hands and chest, on account of grinding and carrying water. She is constantly busy in cleaning the house, and in other domestic jobs, causing her clothes to remain dirty. I informed her about the captives, and advised her to go to you, and make a request for a servant".
It has also been reported that Hazrat Fatima (ra) made a request - "I and Ali own only one bedding and that also is a skin of a goat. We use it in the morning to put the feed of the camel".
The Prophet (saw) said, "Fatima! Be patient. The Prophet Musa (as) and his wife owned only one bedding, which was the cloak of Prophet Musa (as). Fear Allah, acquire taqwa, keep doing your service to Allah and attend to your domestic jobs. When you go to bed, recite Subhanallah 33 times, Alhamdulillah 33 times and Allahu Akbar 34 times. You will find this more helpful than an assistant."
Hazrat Fatima (ra) remarked, "I am happy with what Allah and His Prophet (saw) would be pleased with".
In this Hadith, the prescribed zikr is before sleeping.
In other Ahadith, the Prophet (saw) is reported to have advised Hazrat Fatima (ra) to recite after every salah:
Subhanallah 33 times
Alhamdulillah 33 times
Allahu Akbar 34 times
and the following once, which is: