The Messenger of Allah [SAW] was asked about mead and he said: "Every drink that intoxicates is unlawful," and mead is made from honey. (Using translation from Nasāʾī 5593)
أَنَّ رَسُولَ اللهِ ﷺ سُئِلَ عَنِ الْبِتْعِ فَقَالَ «كُلُّ شَرَابٍ أَسْكَرَ فَهُوَ حَرَامٌ وَالْبِتْعُ مِنَ الْعَسَلِ»