He said that there are words which, if anyone says them three times in his gathering before standing up, his sins committed in that gathering will be forgiven. If he says them in a gathering of goodness or a gathering of remembrance, they will seal that gathering for him just as a seal is stamped upon a document. The words are, "Glory be to You, Allah, and praise be to You. There is no god but You. I seek Your forgiveness and turn to You in repentance."
حدثنا أحمد بن صالح حدثنا ابن وهب قال أخبرني عمرو أن سعيد بن أبي هلال حدثه أن سعيد بن أبي سعيد المقبري حدثه
أنه قال كلمات لا يتكلم بهن أحد في مجلسه عند قيامه ثلاث مرات إلا كفر بهن عنه ولا يقولهن في مجلس خير ومجلس ذكر إلا ختم له بهن عليه كما يختم بالخاتم على الصحيفة سبحانك اللهم وبحمدك لا إله إلا أنت أستغفرك وأتوب إليك
[Its chain is sahih]. It has not been established that Saeed bin Abu Hilal became confused in his memory, and what Saji transmitted from Ahmad is not valid due to its broken chain of transmission.