Narrated Abdullah ibn Amr:
The Prophet (ﷺ) said:
There are two qualities or characteristics which will not be returned by any Muslim without his entering Jannah. While they are easy, those who act upon them are few.
One should say:
“Glory be to Allah” – سبحان الله ten times after every prayer,
“Praise be to Allah” – الحمد لله ten times
and “Allah is Most Great” – الله اكبر ten times
That is a hundred and fifty on the tongue, but one thousand and five hundred on the scale.
When he goes to bed, he should say:
“Allah is Most Great” – الله اكبر thirty-four times,
“Praise be to Allah” – الحمد لله thirty-three times,
and Glory be to Allah – سبحان الله thirty-three times,
for that is a hundred on the tongue and a thousand on the scale.
(He said:) I saw the Messenger of Allah (ﷺ) counting them on his hand.
The people asked: Messenger of Allah! How is it that while they are easy, those who act upon them are few?
He replied: The Devil comes to one of you when he goes to bed and he makes him sleep, before he utters them, and he comes to him while he is engaged in prayer and calls a need to his mind before he utters them.