Ali bin Nasr bin Ali (may Allah have mercy on him) said: People spoke to Abu Asim (may Allah have mercy on him) about his hadith from Malik, from al-Zuhri, from Sa'id and Abu Salamah, from Sayyiduna Abu Hurayrah (may Allah be pleased with him) concerning pre-emption, and he said: Bring someone who heard it from Malik at the time when I heard it. Abu Ja'far al-Mansur came to us in Makkah, and people gathered around him and asked him to order Malik to narrate hadith to them. He ordered him, so Malik narrated hadith in Makkah, and we heard this hadith from Malik at that time.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشفعة / 11567