Ibrahim says that the predecessors considered it disliked to conduct a sale by advance payment (salam) in something whose origin was not present with the people.

Hazrat Nafi' narrates that when Hazrat Ibn Umar (may Allah be pleased with them) was asked about a man making a transaction with another man for a certain period regarding something, even though the original item is not present with the people, what is the ruling on this? He would say that there is no harm in it. Yahya narrates that Hazrat Sa'id bin Musayyib considered it disliked.

21704 - Yahya said: And Sa'id ibn al-Musayyib used to dislike it.

Hazrat Ikrimah considered Bai' Salam permissible only in things whose origin does not exist; otherwise, he regarded it as disliked. Ayub states that I was also informed of the same regarding Hazrat Tawus.

21706 - Ayub said: And I was informed from Tawus the like of that.

Hasan did not see any harm in conducting a salam sale for a known period, whether the seller possessed the original item or not. Muhammad considered the salam sale permissible only for something whose original was present with the seller.

21708 - He said: And Muhammad used to dislike lending except in something whose origin was with its owner.

Hazrat Sha'bi says that Bai' Salam can only be done in something of which people possess a similar example.