The Book of Agriculture
35b/44: Chapter
The Third Of The Conditions, In It Is Sharecropping (Muzara'ah) And Contracting
Sunan an-Nasai
أَخْبَرَنَا مُحَمَّدُ بْنُ حَاتِمٍ، قَالَ أَنْبَأَنَا حِبَّانُ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ شُعْبَةَ، عَنْ حَمَّادٍ، عَنْ إِبْرَاهِيمَ، عَنْ أَبِي سَعِيدٍ، قَالَ إِذَا اسْتَأْجَرْتَ أَجِيرًا فَأَعْلِمْهُ أَجْرَهُ.
It was narrated that Abu Sa'eed said: "When you hire a worker, tell him what his wages will be."
Reference : Sunan an-Nasa'i 3857In-book reference : Book 35b, Hadith 1English translation : Vol. 4, Book 35, Hadith 3888