Musnad Abu Ya'la al-Mawsili 155:238

'Isa ibn Salim narrated to us, 'Ubayd Allah ibn 'Amr narrated to us, from Ayyub, from Muhammad ibn Sirin, from Abu Hurayrah: That the Messenger of Allah (ﷺ) forbade meeting the caravans (for trade). If a person meets them and buys (from them), then the owner of the goods has the choice (to rescind the sale) when he arrives at the market.