Musannaf Ibn Abi Shayba 13:447

Abu Bakr narrated to us, he said: Abda bin Sulayman narrated to us, from Sa'id bin Abi Arubah, from Khalid al-Hadhdha', from Abu Ma'shar, from Ibrahim, from Ibn Mas'ud: He did not see any harm in a man selling goods [bought for] ten for twelve, as long as he did not take profit for the expenditure.