(44) باب الثَّالِثُ مِنَ الشُّرُوطِ فِيهِ الْمُزَارَعَةُ وَالْوَثَائِقُ
It was narrated from Hammad -Ibn Abi Sulaiman- that he was asked about a man who hired a worker in return for food and he said:
"No, not until he tells him (what his wages will be)."
Reference: Sunan an-Nasa'i 3859
In-book reference: Book 35b, Hadith 3
English translation: Vol. 4, Book 35, Hadith 3890