Corpus of Electronic Texts Edition
Cath Maige Tuired: The Second Battle of Mag Tuired (Author: [unknown])

section 164

Then the harp came away from the wall, and it killed nine men and came to the Dagda; and he played for them the three things by which a harper is known: sleep music, joyful music, and sorrowful music. He played sorrowful music for them so that their tearful women wept. He played joyful music for them so that their women and boys laughed. He played sleep music for them so that the hosts slept. So the three of them escaped from them unharmed—although they wanted to kill them.