A jadha suffices for what a thaniyy suffices for

Asim bin Kulayb narrates from his father that he said: In the military campaigns we used to appoint the Companions of the Messenger of Allah (peace and blessings be upon him) as our commanders. We were in Persia when, on the Day of Nahr, the musinnah (a two-year-old sheep or goat) became expensive, so we began taking two jadh'ahs (six-month-old young ones) in exchange for one musinnah. Then a man from the tribe of Muzaynah stood up and said: We were with the Messenger of Allah (peace and blessings be upon him) and faced a situation like this, and we used to take two or three jadh'ahs in exchange for one musinnah. Then the Messenger of Allah (peace and blessings be upon him) said: "Indeed, the jadh'ah (six-month-old young one) suffices for what the thani (two-year-old animal) suffices for."

Asim bin Kulayb narrates from his father that he said: We were with Sayyiduna Mujashi' bin Mas'ud al-Sulami (may Allah be pleased with him) on a military expedition, and sacrificial animals became scarce there. So he said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "Indeed, the jadh'ah (young sheep) suffices for what the thani (older animal) suffices for."

Asim bin Kulayb narrates from his father, and he from a man of the tribe of Muzaynah or Juhaynah, that the Companions of the Messenger of Allah (peace and blessings be upon him), a day or two before the sacrifice, used to give two jadh'ahs (six-month-old lambs) and take one thani (two-year-old animal) (in exchange for the larger animal). So the Messenger of Allah (peace and blessings be upon him) said: "Indeed, the jadh'ah suffices for what the thani suffices for."
This is a hadith in which there is disagreement over Asim bin Kulayb, and it is among those that the two Shaykhs did not record. However, I have made it my condition to use it as evidence, and in my view this hadith is sahih (authentic), because all agree on mentioning the Companion in it, and then the Imam of the discipline of hadith, Sufyan al-Thawri, also named him explicitly.

Sa'id bin al-Musayyab narrates from one of the pure wives of the Prophet (peace and blessings be upon him) that she said: To sacrifice a jadh'ah (six-month-old lamb) of sheep is dearer to me than to sacrifice a musinnah (two-year-old animal) of goats. Muhammad bin Ishaq named this female Companion in this narration as Sayyidah Umm Salamah (may Allah be pleased with her).

It is narrated from Sayyidah Umm Salamah (may Allah be pleased with her) that she said: To sacrifice a jadh'ah (six-month-old lamb) of sheep is more beloved to me than to sacrifice a musinnah (two-year-old animal) of goats.