عَنْ أَبِي هُرَيْرَةَ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: ((الْمَلَائِكَةُ تَلْعَنُ أَحَدَكُمْ إِذَا أَشَارَ بِحَدِيدَةٍ وَإِنْ كَانَ أَخَاهُ لِأَبِيهِ وَأُمِّهِ))
Narrated by Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: When any one of you points towards another with iron, the angels curse him, even if he is his real brother.