Read this passage and open each verse for the full verse feed and commentary tools.
Charitable Giving to the Poor and Prayer
16Moreover when ye fast, be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may be seen of men to fast. Verily I say unto you, They have received their reward. 17But thou, when thou fastest, anoint thy head, and wash thy face; 18that thou be not seen of men to fast, but of thy Father who is in secret: and thy Father, who seeth in secret, shall recompense thee.
Matthew 6:16-18 (ASV)