Bletsung-sealm

According to the Old English Dictionary:

es;

bletsung-sealm

m. The Benedicite :-- Æfter þisum mon sceal singan þone bletsingsealm, þæt is 'Benedicite' inde benedictiones (i. e. canticum trium puerorum) dicantur, R. Ben. 36, 18. bletsung-sealm