On the day of the battle of Uhud the pagans were defeated completely. Then Satan shouted loudly, "O Allah's slaves! Beware the ones behind you!" So the front files attacked the back ones. Then Hudhaifa looked and saw his father, and said loudly, "O Allah's slaves! My father! My father!" By Allah, they did not stop till they killed him (i.e. Hudaifa's father). Hudhaifa said, "May Allah forgive you!" The sub-narrator said, "By Allah, because of what Hudhaifa said, he remained in a good state till he met Allah (i.e. died).  

لَمَّا كَانَ يَوْمُ أُحُدٍ هُزِمَ الْمُشْرِكُونَ هَزِيمَةً بَيِّنَةً فَصَاحَ إِبْلِيسُ أَىْ عِبَادَ اللَّهِ أُخْرَاكُمْ فَرَجَعَتْ أُولاَهُمْ عَلَى أُخْرَاهُمْ فَاجْتَلَدَتْ أُخْرَاهُمْ فَنَظَرَ حُذَيْفَةُ فَإِذَا هُوَ بِأَبِيهِ فَنَادَى أَىْ عِبَادَ اللَّهِ أَبِي أَبِي فَقَالَتْ فَوَاللَّهِ مَا احْتَجَزُوا حَتَّى قَتَلُوهُ فَقَالَ حُذَيْفَةُ غَفَرَ اللَّهُ لَكُمْ قَالَ أَبِي فَوَاللَّهِ مَا زَالَتْ فِي حُذَيْفَةَ مِنْهَا بَقِيَّةُ خَيْرٍ حَتَّى لَقِيَ اللَّهَ ﷻ