Musannaf Ibn Abi Shayba 13:54

Waki’ narrated to us, he said: Sufyan narrated to us, from Mansur, from Ibrahim; and Sufyan, from Mutarrif, from al-Sha’bi; and Sufyan, from Yunus, from al-Hasan; and Sufyan, from ‘Abd al-Malik ibn ‘Umayr, from ‘Amr ibn al-Harith ibn al-Mustaliq; and Sufyan, from ‘Ata’ ibn al-Sa’ib, from Ibn Mughaffal: That they disliked for a man to take part of his *salam* (forward sale) and part of his capital.