It is narrated from Sayyiduna Abu Qatadah (may Allah be pleased with him) that "the Prophet (peace and blessings be upon him) offered the funeral prayer over a grave after (the deceased) had been buried."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Thabit (may Allah have mercy on him), from Abdullah bin Rabah (may Allah have mercy on him), from Sayyiduna Abu Qatadah (may Allah be pleased with him), except Hammad bin Waqid (may Allah have mercy on him)."
Hadith Referenceالمعجم الأوسط / باب الألف / 1964
Hadith Gradingمحدثین:إسناده ضعيف لضعف محمد بن جامع العطار
Hadith Takhrij«قال الهيثمي: فيه محمد بن جامع العطار وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 3، ص 36»» «أخرجه ابن حجر فى «المطالب العالية» برقم: 875 / 2»