´It was narrated that Ibn 'Umar said:` "I heard 'Umar bin Al-Khattab, may Allah be pleased with him, on the Minbar of the Messenger of Allah [SAW], say: 'The prohibition of Khamr was revealed when it was made from five things: From grapes, wheat, barley, dates and honey.'"
Explanation & Benefits
Hafiz Muhammad Ameen
The mention of these five things is not intended to negate other things, but rather to indicate what was customary. Otherwise, whatever substance wine is prepared from, it is forbidden. Even a single drop is forbidden.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 5582