Fit

According to the Old English Dictionary:

fitt, e;

fit

f. A song, poem; cantĭlēna, carmen :-- Ðá se Wísdóm ðas fitte asungen hæfde when Wisdom had sung this song, Bt. 30, 1; Fox 106, 29. On fitte in song, verse, Bt. Met. Fox introduc. 17; Met. Einl. 9. fit