‘A’isha reported God’s Messenger as saying, "On the day of sacrifice no one does a deed more pleasing to God than the shedding of blood. The sacrifice will come on the day of resurrection with its horns, its hairs and its hoofs, and the blood finds acceptance with God before it falls on the ground, so be glad about it.” Tirmidhi and Ibn Majah transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ عَائِشَةَ قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَا عَمِلَ ابْنُ آدَمَ مِنْ عَمَلٍ يَوْمَ النَّحْرِ أَحَبَّ إِلَى اللَّهِ مِنْ إِهْرَاقِ الدَّمِ وَإِنَّهُ لَيُؤْتَى يَوْمَ الْقِيَامَةِ بِقُرُونِهَا وَأَشْعَارِهَا وَأَظْلَافِهَا وَإِنَّ الدَّمَ لَيَقَعُ مِنَ الله بمَكَان قبل أَن يَقع بِالْأَرْضِ فيطيبوا بهَا نفسا» . رَوَاهُ التِّرْمِذِيّ وَابْن مَاجَه
sunnah.com