Berean Standard Bible (BSB)
so that your fasting will not be obvious to men, but only to your Father, who is unseen. And your Father, who sees what is done in secret, will reward you.
World English Bible (WEB)
so that you are not seen by men to be fasting, but by your Father who is in secret, and your Father, who sees in secret, will reward you.
Strong's King James
That{G3704} thou appear{G5316}{(G5652)} not{G3361} unto men{G444} to fast{G3522}{(G5723)}, but{G235} unto thy{G4675} Father{G3962} which{G3588} is in{G1722} secret{G2927}: and{G2532} thy{G4675} Father{G3962}, which{G3588} seeth{G991}{(G5723)} in{G1722} secret{G2927}, shall reward{G591}{(G5692)} thee{G4671} openly{G1722}{G5318}.
The F.O.G *
(18) in order that your fasting isn't noticed by mankind but by Your Father in secret. Your Father who sees in secret will reward you.
The F.O.G Message *
Young's Literal Translation
that thou mayest not appear to men fasting, but to thy Father who is in secret, and thy Father, who is seeing in secret, shall reward thee manifestly.