A.T. Robertson Commentary Hebrews 11:24

"By faith Moses, when he was grown up, refused to be called the son of Pharaoh`s daughter;" — Hebrews 11:24 (ASV)

When he was grown up (μεγας γενομενος). "Having become great" .

Refused (ηρνεσατο). First aorist middle indicative of αρνεομα, to deny, to refuse. He was of age and made his choice not from ignorance.

Son (υιος). Predicate nominative with λεγεσθα (to be spoken of, present passive infinitive, of λεγω).