the first "tribute" is a gerund (i.e. a verb taking the place of a noun) although i'm not sure of the gerund declension in middle english. the second "tribute"

the first "tribute" is a gerund (i.e. a verb taking the place of a noun) although i'm not sure of the gerund declension in middle english. the second "tribute" is an imperative verb (with an implied subject and object).