Hearp-slege

According to the Old English Dictionary:

es;

hearp-slege

m. A striking, playing of the harp :-- On hearpan and on hearpslege and on stefne sealmcwides in cithara, in cithara et voce psalmi, Ps. Lamb. 97, 5. [Icel. hörpu-slagr striking the harp.] hearp-slege