This is ὑμῖν, the dative plural of the second person pronoun, meaning 'to you' or 'for you' when addressing groups. The dative case marked indirect objects, recipients of benefits, or those affected by actions. New Testament letters constantly used this form in promises ('grace to you and peace'), instructions ('I say to you'), and explanations ('this mystery is revealed to you'). The plural dative was essential for epistolary genre where apostles addressed whole churches. It structured the giving and receiving relationships between God, apostolic teachers, and believing communities, marking who received grace, teaching, commands, and encouragement.