Al-Kāfi

Hadith 2038
zakat
3ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ عُمَرَ بْنِ أُذَيْنَةَ عَنْ زُرَارَةَ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ الْسَّلام) قَالَ لَيْسَ فِي صِغَارِ الإِبِلِ شَيْ‏ءٌ حَتَّى يَحُولَ عَلَيْهَا الْحَوْلُ مِنْ يَوْمِ تُنْتَجُ.
3. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from ‘Umar ibn ’Udhaynah from Zurarah who has said the following: “Abu Ja‘far (a.s.), has said, ‘Zakat is not due on camel’s young until one year passes from the day they are born.” (The following chapter seems to be the words of the compiler (rh))
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī