حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا مُعَرِّفُ بْنُ وَاصِلٍ، عَنْ مُحَارِبِ بْنِ دِثَارٍ، عَنِ ابْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ نَهَيْتُكُمْ عَنْ زِيَارَةِ الْقُبُورِ فَزُورُوهَا فَإِنَّ فِي زِيَارَتِهَا تَذْكِرَةً ‏"‏ ‏.‏

Narrated Buraidah: The Messenger of Allah (PBUH) as saying: I forbade you to visit graves, but you may now visit them, for in visiting them there is a reminder (of death). Translation Not Available

Book Ref: Sunan Abi Dawud Book 21 Hadith 3235
Web Ref:  Sunan Abi Dawud Book 20 Hadith 3229