The farmer that planted a hundred yam seedlings and claimed he had planted two hundred will reap a hundred tubers and eat the remaining one hundred lies.
This proverb warns against falsehood acts, pride and self-appraisal on the basis of pleasing others. Life for sure does come with some step backs, which are no big deal. The truth might give you a way out of an unpleasant situation rather than covering it up with lies of great remarks. It is not wise to be suffering and smiling; you will for sure remain the same if you do.
What is implied here is that a reward doesn’t come from the words of the mouth, but rather in the act of the palm. So, it wouldn’t be wise to claim to have done what you haven’t.