Abd al-Rahman bin Abi Layla (may Allah have mercy on him) narrates from Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him), and in it is: "three sa' of dates."
(b) Al-Hakam bin Utaybah (may Allah have mercy on him) narrates from Abd al-Rahman (may Allah have mercy on him): "one faraq (a measure) of raisins."
(c) Abdullah bin Ma'qil (may Allah have mercy on him) narrates from Sayyiduna Ka'b (may Allah be pleased with him): "for each poor person half a sa' of food."
Al-Shafi'i said: Malik erred in this hadith (by omitting Mujahid); the hadith masters preserved it from Abd al-Karim, from Mujahid, from Abd al-Rahman bin Abi Layla, from Ka'b bin Ujrah. The Shaykh said: He erred in this only in some of the presentations (of al-Muwatta), and in some of them he narrated it correctly.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9795