وَقَالَ صلى الله عليه وسلم: ((لاَ تَجْعَلُوا قَبْرِي عِيداً وَصَلُّوا عَلَيَّ؛ فَإِنَّ صَلاَتَكُم تَبْلُغُنِي حَيْثُ كُنْتُمْ)).
(He (PBUH) also said: ‘Do not take my grave as a place of habitual ceremony. Send prayers upon me, for verily your prayers reach me wherever you are.)
Abu Dawud 2/218, Ahmad 2/367. Al-Albani graded it authentic in Sahih Abu Dawud 2/383.