Sealmsang-mǽrsung

According to the Old English Dictionary:

e;

sealmsang-mǽrsung

f. Celebration by psalm-singing, the service of the canonical hours :-- Án weorc hé hæfde unforswigod and nǽfre geleórod, þæt wæs sealmsangmǽrsung and háligra gewrita smeágung he never failed to sing the hours and was never tired of studying the Scriptures, Hml. S. 23 b, 36. sealmsang-mærsung