'Abdullah Bin 'Amir (ra) reported that the Prophet (Saw) said: There are two acts that no Muslim worshiper does consistently bu that he will enter Jannah. And though they are easy, only a few people perform them:
So who among you would commit two thousand five hundred sins in one day (to counter that)?
- After each of the (five) prayers, say tasbih ten times, tahmid ten times, and takbir ten times. This makes one hundred fifty (daily extollments) by tongue, and one thousand five hundred (good deeds) in the scale
- Upon going to bed, say takbir thirty four times, tahmid thirty three times and tasbih thirty three times. This makes one hundred (extollments) by tongue, and one thousand (good deeds) in the scale.
The Prophet (saw) then added:
Satan comes to a person while he is ready to sleep, and makes him fall asleep before he finishes saying them; and he comes to him after prayer, and reminds him of something he needs to do instaed of saying them.
Recorded by Abu Dawud, at Tirmithi and others. Verified to be authentic by al-Albani