Question 13: I have an inquiry regarding a Hadeeth ascribed to Aboo Hurayrah (may Allaah be pleased with him) that the Messenger of Allaah (peace be upon him) said: Whoever visits the graves of their parents or the grave of any of them every Friday will have their sins forgiven and will be recorded as being dutiful to their parents. Please tell me if there is a specific Du‘aa’ (supplication) to be said by the graves of parents. Should such a visit be paid before Jumu‘ah (Friday) Prayer or after it, and is there another special preferred time for doing this on Fridays?
Answer: First, the Hadeeth that is mentioned in the question is very Da‘eef (weak) and can not be used as proof due to its Da‘f (weakness) and non-authenticity.
Second, visiting graves is Mashroo‘ (Islaamically permissible) at any time and there is no evidence that allocates Fridays or any other days for doing so. However, it is related by Imaam Muslim (may Allaah be merciful to him) on the authority of Sulaymaan ibn Buraydah from his father (may Allaah be pleased with them both)that the latter said… read more here.