It was narrated that 'Asim bin Kulaib said:

"I heard my father narrating from a man who said: 'We were with the Messenger of Allah two days before Al-Adha and we started to offer two Jadh ahs for one Thaniiyah, Then the Messenger of Allah said: 'A Jadh'ah is sufficient for that for which a Thaniyah is sufficient."

أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا خَالِدٌ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ عَاصِمِ بْنِ كُلَيْبٍ، قَالَ سَمِعْتُ أَبِي يُحَدِّثُ، عَنْ رَجُلٍ، قَالَ كُنَّا مَعَ النَّبِيِّ ﷺ قَبْلَ الأَضْحَى بِيَوْمَيْنِ نُعْطِي الْجَذَعَتَيْنِ بِالثَّنِيَّةِ فَقَالَ رَسُولُ اللَّهِ ﷺ " إِنَّ الْجَذَعَةَ تُجْزِئُ مَا تُجْزِئُ مِنْهُ الثَّنِيَّةُ " .