The speaker wanted the bard to stop singing because
<span>He was tired of sitting and wanted to participate in the games.
You can read these in the lines
"you've had our fill or food well shared and the lyre too"
and
"test ourselves in contests"</span><span />
Grendel is depicted as an evil mindless monster whose only goal is destruction and spreading evil. Considering that he's not depicted as an intellectual tactician but rather as a brute who wants to eat others, he would probably just heal up and attack again. Either that or he would ask for help from his mother.
This is a quiz isn't this??