الكافي- ط الاسلامية, volume 5, page 196

5. Humayd ibn Ziyad has narrated from Muhammad ibn Sama‘ah from more than one person from Aban ibn ‘Uthman from ‘Abd al- Rahman ibn abu ‘Abd Allah who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the case of a broker who buys for a fee. Notes are given to him with the condition that he brings the merchandise and the buyer accepts whatever he likes and leaves the rest. He then brings the goods and says, ‘Take what you like and leave what you dislike.’ He (the Imam) said, ‘It is lawful.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

6. Ali ibn Ibrahim has narrated from his father from ‘Isma’il ibn Marrar from Yunus from Mu‘awiyah ibn ‘Ammar who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the case of a man who buys sacks made in Hirat, and in al-Quhiy. A man then buys from him ten cloths with the condition that he can choose every cloth, for a certain amount of profit, five or less or more. He (the Imam) said, ‘I do not like this sale. Consider if he cannot find in choosing anything other than five cloths and finds the rest the same.’ Imam’s son, ‘Isma’il said, ‘They have set a condition on him to take ten pieces’ and he repeated it several times. He (the Imam) said, ‘He has set up a condition to take the best. Consider if there is nothing more than five cloths and he finds the rest the same.’ He (the Imam) said, ‘I do not like this deal.’ He (the Imam) disliked it because of one party’s suffering loss.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

7. Muhammad ibn Yahya has narrated from certain persons of his people from al-Husayn ibn al-Hassan from Hammad who have said the following: “Abu ‘ Abd Allah (a.s.), has said, ‘It is undesirable to buy something with dinar which is other than (a particular) dirham because he does not know the value of dinar in relation to the dirham.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.