The dative signals a receiver as a second object, with predicates expressing delivery or communication.
Verbs of delivery
δίδωμι ‘to give (to)’, ἐπιτρέπω ‘to entrust (to)’, πέμπω ‘to send (to)’, προσφέρω ‘to carry (to)’ etc.
Verbs of communication
ἐπιτάττω ‘to impose (a task) on’, κελεύω [Hom. + dat.; Att. + acc.] ‘to impose (a command) on’, πιστεύω ‘to entrust (something) as a task to’ etc.
Both the first object (inanimate, in the accusative) and the second object (animate, in the dative) can be used in the nominative as subject of a passive construction.
In the traditional terminology a receiving (second) object is generally referred to as an indirect object.
ἀλλ’ οὔ πως ἅμα πάντα θεοὶ δόσαν ἀνθρώποισιν
Edoch, de goden geven niet alles tegelijk aan de mensen.