Which parts of this excerpt from beowulf relate to a warrior code?

beowulf answered, ecgtheow's son:
"grieve not, o wise one! for each it is better,
his friend to avenge than with vehemence wail him;
each of us must the end-day abide of
his earthly existence; who is able accomplish
glory ere death! to battle-thane noble
lifeless lying, 'tis at last most fitting.
arise, o king, quick let us hasten
to look at the footprint of the kinsman of grendel!
i promise thee this now: to his place he’ll escape not, . ."