It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Purify these bodies, may Allah purify you. There is no servant who spends the night in a state of purity except that an angel spends the night with him in his undergarment (the clothing next to his body). Whenever he turns over at any hour of the night, the angel says: 'Allahummaghfir li-'abdika fa-innahu bata tahiran' (O Allah, forgive this servant of Yours, for he spent the night in a state of purity)."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ata bin Abi Rabah except al-Abbas bin Utbah; Isma'il bin Ayyash is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 5087
Hadith Gradingمحدثین:إسناده حسن
Hadith Takhrij«قال الهيثمي: وإسناده حسن «مجمع الزوائد ومنبع الفوائد، ج 10، ص 128»»