Alhamdulillah. The mentioned hadith is saheeh. The hadith was compiled by Imam Muslim (2698) in his book Sahih from Musab bin Saad bin Abi Waqqas . Then he said: Are any of you unable to do a thousand good deeds every day ? Then one of his disciples asked: How can a thousand virtues be written for one of us ? Then he said: If he recites Tasbeeh a hundred times (Subhanallah), one thousand virtues will be written for him or one thousand sins will be forgiven. " In all the traditions of Sahih Muslim, أو يُحَطّ (or sins will be forgiven) is described in this way. Al-Barkbani said: The hadith is narrated from Musa, including Shuba , Abu Awana and Yahya al-Qattan ; Imam Muslim has also narrated this hadith from the source of Musa. They all said ويُحَطّ (and sins will be forgiven) except Alif . And Ya'lao says : أو يُحَطّ ( or sins will be forgiven). [See: Musnad Ahmad (3/133)] Sahih ' . Mollah Ali Qari in his book "Mirqbatul Mafatih" (4/1594) said: "Since ten virtues are given instead of one virtue. This is the minimum unit of increase promised in the Qur'anic verses "Whoever brings a good deed will get ten times as much" [Surah An-Nam , verse: 180] and "Increase the desire for Allah " [Surah Bakbara , verse: 281]. One virtue in a haram area is equal to one lakh virtues. Or his one thousand sins will be forgiven. "That is, whether it is a minor sin or a poet's sin ; it is the will of Allah." [Concluding] Since ten virtues will be given in one virtue. So the person who recites Tasbeeh a thousand times will get ten thousand virtues. Will be increased in this way. God's grace is abundant. Close to what has been narrated in this hadith is a hadith narrated by Imam Bukhari (3293) and Imam Muslim (2691) from Abu Hurairah (R) that the Prophet (peace and blessings of Allaah be upon him) said: الْمُلْكُ وَلَهُ الْحَمْدُ ، وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِير ( Meaning : There is no true god but One God. He has no partner. His is the kingdom. All praise is due to Him. He has power over all things.) One hundred rewards will be written for him , his one hundred sins will be erased , it will be a protection for him from the devil till the evening of that day . Except. " Imam Muslim ( 2692 ) narrates from Abu Hurairah (R) that he said : The Messenger of Allah , may Allah bless him and grant him peace, said : It will be recited a hundred times in the morning and a hundred times in the evening . On the Day of Resurrection , no one will be able to bring anything better than him. It is clearly quoted in this hadith that the person who "acts more than him" and "acts more than him": he will get a better reward than the one who utters it a hundred times. That is, he will say this dhikr two hundred times in one day , say it three hundred times… or Allah will say it as many times as he wants. Whoever increases will get more in the sight of Allah. God's grace is abundant.