Concerning a man who says to another, "I will hire from you to Mecca for such and such, and if I travel for a month or such and such," naming something specific, "you will get an extra such and such," they saw no harm in this. But they disliked that he say, "I will hire from you for such and such, and if I take more than a month, I will deduct such and such from your hire."
أخبرنا محمد قال حدثنا حبان قال أنبأنا عبد الله عن معمر
في رجل قال لرجل أستكري منك إلى مكة بكذا وكذا فإن سرت شهرا أو كذا وكذا شيئا سماه فلك زيادة كذا وكذا فلم يريا به بأسا وكرها أن يقول أستكري منك بكذا وكذا فإن سرت أكثر من شهر نقصت من كرائك كذا وكذا
No references are available.
[Its chain of transmission is sahih] Nasai alone narrated it.