If you wrong your brother, seek his pardon before he dies. In the Hereafter, payment will be made by deeds. If you have no good deeds to pay with, then some of his bad deeds will be added to yours.
Sahih al-Bukhari 6534
Full Hadith
حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي مَالِكٌ، عَنْ سَعِيدٍ الْمَقْبُرِيِّ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ “ مَنْ كَانَتْ عِنْدَهُ مَظْلَمَةٌ لأَخِيهِ فَلْيَتَحَلَّلْهُ مِنْهَا، فَإِنَّهُ لَيْسَ ثَمَّ دِينَارٌ وَلاَ دِرْهَمٌ مِنْ قَبْلِ أَنْ يُؤْخَذَ لأَخِيهِ مِنْ حَسَنَاتِهِ، فَإِنْ لَمْ يَكُنْ لَهُ حَسَنَاتٌ أُخِذَ مِنْ سَيِّئَاتِ أَخِيهِ، فَطُرِحَتْ عَلَيْهِ ”.
Narrated Abu Hurayrah:
Allah’s Messenger (ﷺ) said, “Whoever has wronged his brother, should ask for his pardon (before his death), as (in the Hereafter) there will be neither a Dinar nor a Dirham. (He should secure pardon in this life) before some of his good deeds are taken and paid to his brother, or, if he has done no good deeds, some of the bad deeds of his brother are taken to be loaded on him (in the Hereafter).”
Lesson
We should always forgive our brothers/sisters of Islam. We never know when our last moment is going to be with them, and we surely do not want it to be a regretful one. Hence, we should not argue with our brothers/sisters; instead, forgive and forget!