Matthew 6:16-18

Young's Literal Translation

¹⁶ `And when ye may fast, be ye not as the hypocrites, of sour countenances, for they disfigure their faces, that they may appear to men fasting; verily I say to you, that they have their reward.

¹⁷ `But thou, fasting, anoint thy head, and wash thy face,

¹⁸ 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.