Musannaf Ibn Abi Shaybah 11057 — Land that yields wheat or barley

Al-Hasan said: When wheat or barley come out of the land, and each of the two is less than five wasqs (a specific measure), but when the two are put together they make five wasqs or more, then zakah is due on both, because each of them is a crop. But if there is wheat and raisins, and they do not make five wasqs, then nothing is due on them until each of them reaches the measure of five wasqs. When they reach five wasqs, then a tenth (ushr) is due on it.