Reference: Siyar A’laam an-Nubalaa – Volume 12, Page 391
‘Abdul-Majeed ibn Ibraaheem said to Abu ‘Abdillaah al-Bukhaaree:
How is it that you do not supplicate against those who oppress you, backbite you, and slander you!!?
He replied: The Prophet (sal-Allaahu ‘alayhi wa sallam) said:
«…so be patient till you meet me at the Tank (i.e. Lake of Kauthar – on the Day of Resurrection)»
 Transmitted by al-Bukhaaree