'Doest' in the Bible

When therefore thou doest alms, sound not a trumpet before thee, as the hypocrites do in the synagogues and in the streets, so that they may have glory from men. Verily I say unto you, They have their reward.

But thou, when thou doest alms, let not thy left hand know what thy right hand does;

And when he came into the temple, the chief priests and the elders of the people came to him as he was teaching, saying, By what authority doest thou these things? and who gave thee this authority?