Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The Prophet (peace and blessings be upon him) taught Sayyiduna Imam al-Hasan bin Ali (may Allah be pleased with him) that when he entered the mosque he should send blessings upon the Prophet (peace and blessings be upon him) and say: "O Allah, forgive us our sins and open for us the doors of Your mercy"; and when he came out of the mosque he should send blessings upon the Prophet (peace and blessings be upon him) and say: "O Allah, open for us the doors of Your bounty."
Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Salim bin Abd al-A'la, who is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2097
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«أخرجه المعجم الأوسط للطبراني برقم: 6608»