Hawzah News Agency – Imam Zayn al-Abidin said, 'I heard Husayn (AS) say,

لَو شَتَمَني رَجلٌ في هَذهِ الأُذُنِ - وَأومى إلى اليُمنى - وَاعتَذَر لي في الاُخرى لَقَبِلتُ ذلك مِنهُ، وَذَلِكَ‏أنَّ أميرَالمُؤمِنينَ عَليَّ بنَ أبي طالبٍ عليه السلام حَدَّثَني أنَّهُ سَمِعَ جَدّي رسولُ اللَّهِ صلى اللَّه عليه وآله يَقولُ: لا يَرِدُ الحَوضَ مَن لَم يَقبَلِ العُذرَ مِن مُحقٍّ أو مُبطِلٍ.

'If a man were to insult me in this ear - pointing to his right ear - and excuse himself to me in the other, I would accept that [excuse] from him, and that is because the Commander of the Faithful Ali b. Abu Talib (AS) narrated to me that he had heard my grandfather, the Prophet (SAWA) say, 'The one who does not accept the excuse of someone, be he right or wrong, will not arrive at the Heavenly Waters.'

Source: Ihqaq al-Haqq, v. 11, p. 431