عَنْ مُحَمَّدِ بْنِ أَبِي يَحْيَى قَالَ حَدَّثَتْنِي أُمِّي عَنْ أُمِّ بِلَالٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ ضَحُّوا بِالْجَذَعِ مِنَ الضَّأْنِ فَإِنَّهُ جَائِزٌ
It is narrated from Sayyida Umm Bilal (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: Sacrifice a one-year-old sheep of the breed; its sacrifice is permissible.