Imam Malik (may Allah have mercy on him) was informed that someone said to Sayyiduna Umar bin Khattab (may Allah be pleased with him): A person lends grain to someone on the condition that it will be repaid in such-and-such city. He considered this disliked and said: Where will the cost of transportation go?
Hadith Referenceموطا امام مالك رواية يحييٰ / كتاب البيوع / 1388