Juwairiyah bint Al-Harith (رضي الله عنها), the Mother of the Believers, reported:
The Prophet صلّى اللَّهُ عليه وسلّم came out from my apartment in the morning as I was busy in performing the dawn prayer. He came back in the forenoon and found me sitting there. The Prophet صلّى اللَّهُ عليه وسلّم said, "Are you still in the same position as I left you." I replied in the affirmative. Thereupon the Prophet said, "I recited four words three times after I had left you. If these are to be weighed against all you have recited since morning, these will be heavier.
The Prophet صلّى اللَّهُ عليه وسلّم came out from my apartment in the morning as I was busy in performing the dawn prayer. He came back in the forenoon and found me sitting there. The Prophet صلّى اللَّهُ عليه وسلّم said, "Are you still in the same position as I left you." I replied in the affirmative. Thereupon the Prophet said, "I recited four words three times after I had left you. If these are to be weighed against all you have recited since morning, these will be heavier.
These are:
سبحان
الله وبحمده عدد خلقه، ورضا نفسه، وزنة عرشه، ومداد كلماته""
Subhan-Allaahi wa bihamdihi, `adada khalqihi, wa rida nafsihi, wa
zinatah `arshihi, wa midada kalimatihi.