Language:
كتاب الزكاة
24  
Obligatory Charity Tax (Zakat)
(31)
Chapter: How much is Zakat, and how much may be given in charity? And whoever gave a sheep in charity.
(31)
باب قَدْرُ كَمْ يُعْطَى مِنَ الزَّكَاةِ وَالصَّدَقَةِ وَمَنْ أَعْطَى شَاةً
Sahih al-Bukhari 1446

Narrated Um 'Atiyya:

A sheep was sent to me (Nusaiba Al-Ansariya) (in charity) and I sent some of it to `Aisha. The Prophet asked `Aisha for something to eat. `Aisha replied that there was nothing except what Nusaiba Al-Ansariya had sent of that sheep. The Prophet (ﷺ) said to her, "Bring it as it has reached its place."

حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا أَبُو شِهَابٍ، عَنْ خَالِدٍ الْحَذَّاءِ، عَنْ حَفْصَةَ بِنْتِ سِيرِينَ، عَنْ أُمِّ عَطِيَّةَ ـ رضى الله عنها ـ قَالَتْ بُعِثَ إِلَى نُسَيْبَةَ الأَنْصَارِيَّةِ بِشَاةٍ فَأَرْسَلَتْ إِلَى عَائِشَةَ ـ رضى الله عنها ـ مِنْهَا فَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ عِنْدَكُمْ شَىْءٌ ‏"‏‏.‏ فَقُلْتُ لاَ إِلاَّ مَا أَرْسَلَتْ بِهِ نُسَيْبَةُ مِنْ تِلْكَ الشَّاةِ فَقَالَ ‏"‏ هَاتِ فَقَدْ بَلَغَتْ مَحِلَّهَا ‏"‏‏.‏
Reference : Sahih al-Bukhari 1446
In-book reference : Book 24, Hadith 49
USC-MSA web (English) reference : Vol. 2, Book 24, Hadith 525
  (deprecated numbering scheme)