4. Ali ibn Ibrahim has narrated from his father from ibn abu ‘ Umayr from ‘Abd al- Rahman ibn al-Hajjaj who has said the following: “I once said to abu ‘Abd Allah , ‘A man comes to me and asks for certain goods. I contract with him for a certain profit, then buy it to sell to him. He (the Imam) asked, ‘Does he have the choice to take or leave it?’ I replied, ‘Yes, he does.’ He (the Imam) said, Tt is lawful.’ I then said, ‘There are those among us who destroy it.’. He (the Imam) asked, ‘Why is that?’ I replied, ‘He sells what is not with him.’ He (the Imam) asked, ‘What does he say about advance payment to receive goods in future in which case he sells what is not with him?’ I replied, ‘Yes, it happens.’ He (the Imam) said, Tt is valid because they call it advance payment. My father would say, “It is lawful to sell all kinds of goods that you can find at the time you sell.’””