Middæg-sang

According to the Old English Dictionary:

es;

middæg-sang

m. The midday service :-- Úhtsang and prímsang, undernsang and middægsang, nónsang and ǽfensang, and nihtsang, L. Ælfc, C. 19; Th. ii. 350, 7. De officio sextae horae. Middægsang. On midne dæg wé sculon God herian, Btwk. 216, 13: R. Ben. 39, 19: 40, 7. middæg-sang