It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) as marfu' that the Prophet (peace and blessings be upon him) said: "Whoever recites this supplication three times: 'Allahumma laka al-hamd, la ilaha illa anta wahdaka la sharika lak, anta rabbi wa ana 'abduk, amantu bika mukhlisan laka dini, asbahtu 'ala 'ahdika wa wa'dika mastata'tu, atubu ilayka min su'i 'amali, wa astaghfiruka li-dhanbi la yaghfiruhu illa ant' (O Allah, to You alone belongs all praise; there is no god but You, You are alone and have no partner; You are my Lord and I am Your servant; I have believed in You, having made my religion sincerely Yours; I have reached the morning upon Your covenant and Your promise as far as I am able; I repent to You from my evil deeds and I ask Your forgiveness for my sin, which none forgives but You), then whoever recites it during the day, Allah makes him forbidden to the Fire."
Hadith Referenceالمعجم الأوسط / باب الميم / 8309
Hadith Gradingمحدثین:إسناده ضعيف جدًّا، فيه عمرو بن الحصين متروك
Hadith Takhrij«قال الهيثمي: وفيه عمرو بن الحصين العقيلي وهو متروك «مجمع الزوائد ومنبع الفوائد، ج 10، ص 119»»