Slow in word, swift in deed

Similar sayings:

Swiftest horse cannot overtake the word once spoken Swiftest horse cannot overtake the word once spoken
We are not so much concerned if you are slow as when you come to a halt We are not so much concerned if you are slow as when you come to a halt
Many books do not use up words; many words do not use up thoughts Many books do not use up words; many words do not use up thoughts
Water and words are easy to pour but impossible to recover Water and words are easy to pour but impossible to recover
Four things come not back: the spoken word, the sped arrow, the past life and the neglected opportunity. Four things come not back: the spoken word, the sped arrow, the past life and the neglected opportunity.

Chinese sayings and proverbs