'Sour' in the Bible

'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.

He told them another parable, “The kingdom of heaven is like leaven, which a woman took and worked into three measures of flour until all of it was leavened.”

They gave him sour wine to drink mixed with gall. When he had tasted it, he would not drink.

Immediately one of them ran and got a sponge, filled it with sour wine, fixed it on a reed, and offered Him a drink.