Sahih al-Bukhari, Volume 6, Book 60, Hadith 415 (USC-MSA) ⓘ

Narrated Um Atiya: We took the oath of allegiance to Allah's Messenger and he recited to us: 'They will not associate anything in worship with Allah,' and forbade us to bewail the dead. Thereupon a lady withdrew her hand (refrained from taking the oath of allegiance), and said, "But such-and-such lady lamented over one of my relatives, so I must reward (do the same over the dead relatives of) hers." The Prophet did not object to that, so she went (there) and returned to the Prophet so he accepted her pledge of allegiance.

حَدَّثَنَا أَبُو مَعْمَرٍ، حَدَّثَنَا عَبْدُ الْوَارِثِ، حَدَّثَنَا أَيُّوبُ، عَنْ حَفْصَةَ بِنْتِ سِيرِينَ، عَنْ أُمِّ عَطِيَّةَ ـ رضى الله عنها ـ قَالَتْ بَايَعْنَا رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَرَأَ عَلَيْنَا ‏{‏أَنْ لاَ يُشْرِكْنَ بِاللَّهِ شَيْئًا‏}‏ وَنَهَانَا عَنِ النِّيَاحَةِ، فَقَبَضَتِ امْرَأَةٌ يَدَهَا فَقَالَتْ أَسْعَدَتْنِي فُلاَنَةُ أُرِيدُ أَنْ أَجْزِيَهَا‏.‏ فَمَا قَالَ لَهَا النَّبِيُّ صلى الله عليه وسلم شَيْئًا فَانْطَلَقَتْ وَرَجَعَتْ فَبَايَعَهَا‏.‏