Hadith: Is anyone of you unable to earn one thousand good deeds each day? One of those present asked: How can one earn one thousand good deeds? He replied: By glorifying Allah one hundred times, one thousand good deeds will be added to his record, or one thousand sins will be removed from his record

عن سعد بن أبي وقَّاص رضي الله عنه قال: كنا عند رسول الله صلى الله عليه وسلم فقال: «أَيَعْجِزُ أحَدُكم أن يَكْسِبَ في كل يوم ألف حسنة؟!» فسأله سائل من جُلَسَائِه: كيف يَكْسِبُ ألف حَسَنَة؟ قال: «يُسبح مائة تسبيحة؛ فيُكْتَبُ له ألفُ حسنة، أو يُحَطُّ عنه ألف خَطِيئة».
[صحيح] - [رواه مسلم]

Sa‘d ibn Abi Waqqās (may Allah be pleased with him) reported: We were with the Messenger of Allah (may Allah's peace and blessings be upon him) when he said: "Is anyone of you unable to earn one thousand good deeds each day?" One of those present asked: "How can one earn one thousand good deeds?" He replied: "By glorifying Allah one hundred times, one thousand good deeds will be added to his record, or one thousand sins will be removed from his record."
[Authentic hadith] - [Narrated by Muslim]

Explanation

The Prophet (may Allah's peace and blessings be upon him) asks his Companions: Are you not able to obtain one thousand rewards each day? So, a person sitting with him asked: How can one obtain one thousand rewards easily? He said: When one says "Glory be to Allah" one hundred times, one thousand good deeds will be written for him, because the reward of one good deed is multiplied ten times, and one thousand of his sins will be erased.