The correct answer is mutual respect. Beowulf respects Hrothgar as a king and Hrothgar knows who Beowulf is. The saxon code had them all respect each other based on their families, and Beowulf was famous so Hrothgar respected him, and since Hrothgar was a noble king, Beowulf respected him as well.
I sincerely appreciate the opportunity you give me, but I can not attend. I'm am currently on lock down orders and if I leave it will be very difficult to come back.