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حَدَّثَنَا قُتَيْبَةُ عَنْ مَالِكٍ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ عَنْ ابْنِ عُمَرَعَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ أَيُّمَا رَجُلٍ قَالَ لِأَخِيهِ كَافِرٌ فَقَدْ بَاءَ بِهِ أَحَدُهُمَاهَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ وَمَعْنَى قَوْلِهِ بَاءَ يَعْنِي أَقَرَّ

Narrated to us [Qutaibah] from [Malik] from [Abdullah bin Dinar] from [Ibn Umar] from the Prophet peace be upon him , he said: "Whoever says to his brother (a Muslim); 'O infidel' then indeed one of the two has occupied (the position of) the infidel." This is a hasan shahih gharib hadith, while the meaning of bâ'a is aqarra (to occupy).