Musannaf Ibn Abi Shaybah 10360 — Crops watered by flowing water

It is narrated from Nafi' that Sayyiduna Ibn Umar (may Allah be pleased with them both) used to say: The zakah of fruits and crops, whether it is dates, wheat, barley or a kind of barley (sult), whether the land draws its water from the soil's moisture, or is irrigated by a river, or is irrigated by spring water, or is rain-fed through channels, or is irrigated by rainwater: on it there is a tenth, that is, one in every ten; and on land irrigated by bucket there is half a tenth, that is, one in every twenty.