A man from Muzaina or Juhaina says that one or two days before Eid al-Adha, the companions (may Allah be pleased with them) used to give two six-month-old sheep and take one animal for the whole year. So the Prophet Muhammad (peace be upon him) said: "Whoever is sufficed by a one-year-old animal, a six-month-old animal will also suffice for him."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23123