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 m

Masruq reported:

I heard 'A'isha (Allah be pleased with her) clapping her hands behind the curtain and saying: I used to weave garlands for the sacrificial animals of Allah's Messenger (ﷺ) with my own hands, and then he (the Holy Prophet) sent them (to Mecca), and he did not avoid doing anything which a Muhritn avoids until his animal was sacrificed.
وَحَدَّثَنَا سَعِيدُ بْنُ مَنْصُورٍ، حَدَّثَنَا هُشَيْمٌ، أَخْبَرَنَا إِسْمَاعِيلُ بْنُ أَبِي خَالِدٍ، عَنِ الشَّعْبِيِّ، عَنْ مَسْرُوقٍ، قَالَ سَمِعْتُ عَائِشَةَ، وَهْىَ مِنْ وَرَاءِ الْحِجَابِ تُصَفِّقُ وَتَقُولُ كُنْتُ أَفْتِلُ قَلاَئِدَ هَدْىِ رَسُولِ اللَّهِ صلى الله عليه وسلم بِيَدَىَّ ثُمَّ يَبْعَثُ بِهَا وَمَا يُمْسِكُ عَنْ شَىْءٍ مِمَّا يُمْسِكُ عَنْهُ الْمُحْرِمُ حَتَّى يُنْحَرَ هَدْيُهُ.
Reference : Sahih Muslim 1321m
In-book reference : Book 15, Hadith 410
USC-MSA web (English) reference : Book 7, Hadith 3044
  (deprecated numbering scheme)