Matthew 6:18

18so thatὅπωςnotμὴyou might appearφανῇςτοῖςto menἀνθρώποις[as] fastingνηστεύωνbutἀλλὰτῷto Fatherπατρίyourσουthe [One]τῷinἐντῷsecretκρυφαίῳ·andκαὶtheὁFatherπατήρof youσουthe [One]ὁseeingβλέπωνinἐντῷsecretκρυφαίῳwill rewardἀποδώσειyouσοι.

so that you might not appear to men [as] fasting, but to your Father, the One in secret. And your Father, the One seeing in secret, will reward you.