I said: 'O Messenger of Allah we are going to meet the enemy tomorrow and we do not have any knives.' The Messenger of Allah said: If the blood is shed and the name of Allah is mentioned, then eat, unless (it is slaughtered (with teeth or nails, and I will tell you about that. As for teeth, they are bones, and as for nails, they are the knives of the Ethiopians.' (Sahih )

:Telah mengabarkan kepada kami Qutaibah bin Sa'id ia berkata; telah menceritakan kepada kami Sufyan dari Abdullah bin Dinar dari Ibnu Umar dari Nabi shallallahu 'alaihi wasallam bersabda: Setiap dua orang yang berjual beli memiliki hak memilih selama mereka belum berpisah atau jual beli mereka dengan syarat adanya hak memilih.