كتاب الحج
15  
The Book of Pilgrimage
(64)
Chapter: It is recommended to send the sacrificial animal to the Haram for one who does not intend to go there himself; It is reommended to garland it and to make the garland, but the one who sends it does not enter a state of Ihram, and nothing is forbidden to him because of that
(64)
باب اسْتِحْبَابِ بَعْثِ الْهَدْىِ إِلَى الْحَرَمِ لِمَنْ لاَ يُرِيدُ الذَّهَابَ بِنَفْسِهِ وَاسْتِحْبَابِ تَقْلِيدِهِ وَفَتْلِ الْقَلاَئِدِ وَأَنَّ بَاعِثَهُ لاَ يَصِيرُ مُحْرِمًا وَلاَ يَحْرُمُ عَلَيْهِ شيء بِذَلِكَ
Sahih Muslim 1321 e

'A'isha reported:

I wove the garlands for the sacrificial animals of Allah's Messenger (ﷺ) with my own bands, and then he (the Holy Prophet) marked them, and garlanded them, and then sent them to the House, and stayed at Medina and nothing was forbidden to him which was lawful for him (before).
وَحَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ، حَدَّثَنَا أَفْلَحُ، عَنِ الْقَاسِمِ، عَنْ عَائِشَةَ، قَالَتْ فَتَلْتُ قَلاَئِدَ بُدْنِ رَسُولِ اللَّهِ صلى الله عليه وسلم بِيَدَىَّ ثُمَّ أَشْعَرَهَا وَقَلَّدَهَا ثُمَّ بَعَثَ بِهَا إِلَى الْبَيْتِ وَأَقَامَ بِالْمَدِينَةِ فَمَا حَرُمَ عَلَيْهِ شَىْءٌ كَانَ لَهُ حِلاًّ ‏.‏
Reference : Sahih Muslim 1321e
In-book reference : Book 15, Hadith 402
USC-MSA web (English) reference : Book 7, Hadith 3036
  (deprecated numbering scheme)