It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever visits the grave of his parents, or of one of them, every Friday is forgiven and is recorded as dutiful (to his parents)."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is not narrated from the Messenger of Allah (peace and blessings be upon him) except with this chain; Yahya bin al-Ala' is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 6114
Hadith Gradingمحدثین:إسناده ضعيف لضعف عبد الكريم أبي أمية
Hadith Takhrij«قال الهيثمي: وفيه عبد الكريم أبو أمية وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 3، ص 59»» «أخرجه الطبراني فى «الصغير» برقم: 955»