Hadith 5:280
Waki’ narrated to us, from Hammam, from Qatadah, from Salih Abu al-Khalil, who said: The Messenger of Allah (may Allah bless him and grant him peace) ordained regarding what is watered by the sky, or a flowing spring, or water from a stream, or what is naturally irrigated (ba’l), a full tenth. And what is watered by a rope and bucket (i.e., drawn from a well), then half of a tenth.
حدثنا وكيع عن همام عن قتادة عن صالح أبي الخليل قال سن رسول الله صلى الله عليه وسلم فيما سقت السماء أو العين السائحة وماء ( ( ( وماؤ ) ) ) الغيل أو كان بعلا العشر كاملا وما سقي بالرشاء فنصف العشر