صحيح البخاري
Sahih Bukhari
كتاب الأدب
The Book of Al-Adab (Good Manners)
بَابُ مَنْ لَمْ يَرَ إِكْفَارَ مَنْ قَالَ ذَلِكَ مُتَأَوِّلاً أَوْ جَاهِلاً:
(74) Chapter. Whoever does not consider as Kafir the person who says that (i.e., O Kafir), if he thinks that what he says is true, or if he is ignorant of the seriousness of such saying.
Hadith 6108
حَدَّثَنَا قُتَيْبَةُ ، حَدَّثَنَا لَيْثٌ ، عَنْ نَافِعٍ ، عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا ، أَنَّهُ أَدْرَكَ عُمَرَ بْنَ الْخَطَّابِ فِي رَكْبٍ وَهُوَ يَحْلِفُ بِأَبِيهِ ، فَنَادَاهُمْ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ " أَلَا إِنَّ اللَّهَ يَنْهَاكُمْ أَنْ تَحْلِفُوا بِآبَائِكُمْ ، فَمَنْ كَانَ حَالِفًا فَلْيَحْلِفْ بِاللَّهِ وَإِلَّا فَلْيَصْمُتْ " .
Narrated Ibn `Umar: that he found `Umar bin Al-Khattab in a group of people and he was swearing by his father. So Allah's Apostle called them, saying, "Verily! Allah forbids you to swear by your fathers. If one has to take an oath, he should swear by Allah or otherwise keep quiet."
