It is narrated from Sayyiduna Abu al-Darda' (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever says when he goes to his bed: 'Al-hamdu lillahil-ladhi 'ala fa qahar, wa batana fa khabar, wa malaka fa qadar, al-hamdu lillahil-ladhi yuhyi wa yumit, wa huwa 'ala kulli shay'in qadir' (All praise is for Allah who is exalted and so prevails over all, who is hidden and so knows everything, who owns and so has full power; all praise is for Allah who gives life and causes death, and He has power over all things), he comes out of his sins like the day his mother gave birth to him."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Janab except Ishaq bin al-Wazir, and Sahl bin al-Abbas is alone in narrating it."
It is like this in the Dar al-Haramayn edition and in Majma' al-Bahrayn, and we have not found anyone who attributed him to "al-Sa'di"; and Allah knows best.
Hadith Referenceالمعجم الأوسط / باب الميم / 7891
Hadith Gradingمحدثین:إسناده ضعيف لضعف أبي جناب الكلبي
Hadith Takhrij«قال الهيثمي: وفيه أبو جناب الكلبي وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 10، ص 124»»