Hrothgar intends to reward Beowulf with many valuable gifts. This reflects the concept of not having any debt with those who did something for you.
Explanation:
Beowulf is an Anglo-Saxon epic poem that reflects various values of Anglo-Saxon culture. We can see one of these values when Hrothgar, the king of Denmark, rewards Beowulf with numerous valuable gifts, after Beowulf manages to free his people from all the evils of the showy Grendel, freeing the people even from Grendel's mother, who could take revenge.
Hrothgar offers these gifts as a way of not keeping a debt with Beowulf, besides thanking him for his achievements.