The Prophet ﷺ said, "There are two practices which no Muslim servant maintains regularly except that he enters Paradise. They are easy, yet few are those who act upon them. After every prayer, one says 'Subhan Allah' ten times, 'Alhamdulillah' ten times, and 'Allahu Akbar' ten times. That makes one hundred and fifty on the tongue, and one thousand five hundred on the scale. And when he lies down to sleep, he says 'Allahu Akbar' thirty-four times, 'Alhamdulillah' thirty-three times, and 'Subhan Allah' thirty-three times. That makes one hundred on the tongue, and one thousand on the scale."I saw the Messenger of Allah ﷺ counting them on his hand.They asked, "Messenger of Allah, how are they easy, yet few are those who act upon them?"He replied, "Satan comes to one of you in his bed and puts him to sleep before he says them, and he comes to him during his prayer and reminds him of some need before he says them."
حدثنا حفص بن عمر حدثنا شعبة عن عطاء بن السائب عن أبيه
عن النبي ﷺ قال خصلتان أو خلتان لا يحافظ عليهما عبد مسلم إلا دخل الجنة هما يسير ومن يعمل بهما قليل يسبح في دبر كل صلاة عشرا ويحمد عشرا ويكبر عشرا فذلك خمسون ومائة باللسان وألف وخمس مائة في الميزان ويكبر أربعا وثلاثين إذا أخذ مضجعه ويحمد ثلاثا وثلاثين ويسبح ثلاثا وثلاثين فذلك مائة باللسان وألف في الميزان فلقد رأيت رسول الله ﷺ يعقدها بيده قالوا يا رسول الله كيف هما يسير ومن يعمل بهما قليل قال يأتي أحدكم يعني الشيطان في منامه فينومه قبل أن يقوله ويأتيه في صلاته فيذكره حاجة قبل أن يقولها
Its isnad is hasan. Tirmidhi transmitted it, Supplications, chapter (25) on the virtue of tasbih, tahmid, takbir, etc., no. 3410, and Ibn Majah, no. 926, and Nasai, no. 1349, from the hadith of Ata bin Saaib with this wording. Tirmidhi said, hasan sahih, and Ibn Hibban graded it sahih, nos. 539, 540, 2343, 2344.