I did not hear the Messenger of Allah ﷺ making a concession for anything people say falsely except in three matters. The Messenger of Allah ﷺ would say: I do not count as a liar a man who puts things right between people, saying a word by which he intends only putting things right, and a man who says something in war, and a man who says something to his wife, or a wife who says something to her husband.
سَمِعْتُ رَسُولَ اللَّهِ ﷺ يُرَخِّصُ فِي شَىْءٍ مِنَ الْكَذِبِ إِلاَّ فِي ثَلاَثٍ كَانَ رَسُولُ اللَّهِ ﷺ يَقُولُ لاَ أَعُدُّهُ كَاذِبًا الرَّجُلُ يُصْلِحُ بَيْنَ النَّاسِ يَقُولُ الْقَوْلَ وَلاَ يُرِيدُ بِهِ إِلاَّ الإِصْلاَحَ وَالرَّجُلُ يَقُولُ فِي الْحَرْبِ وَالرَّجُلُ يُحَدِّثُ امْرَأَتَهُ وَالْمَرْأَةُ تُحَدِّثُ زَوْجَهَا