Salim bin Abdullah narrates from his father, and he from the Prophet ﷺ. I do not know whether in the narration through Sufyan bin Husain, Ibn Umar (may Allah be pleased with them both) narrated from the Prophet ﷺ through Umar (may Allah be pleased with him) or not. Regarding the zakat of camels, it is narrated in the same meanings which are not contrary to this, and I do not know, rather if Allah wills, I have no doubt except that he narrated to me the entire hadith regarding goats, partners among themselves, and silver in the same way, except that I was only able to remember the part about camels from his narration.
Hadith Referenceمسند الإمام الشافعي / كتاب الزكاة / 697
Hadith Takhrijاخرجه ابوداود ، الزكاة، باب في زكاة السائمة (1568) والترمذى الزكاة، باب ماجاء في زكاة الابل والغن (621) ۔ وقال ”حسن“ وصححه ابن خزيمة (2267) ۔ والحاكم 93،94/11 ، 392۔