What are the famous sayings or poems about "a promise is worth a thousand dollars"

"Three cups of spit promise, five mountains are light."

-Li Bai's "Chivalry" poem describes that commitment is more important than mountains and emphasizes the importance of honesty.

People can't stand without faith.

"People who don't believe are not only possible" (Confucius), which means: "If you believe, you will know what you can do".

"Ji Bu has no promise, Hou Sheng has a word."

"Even to the death, I will wait for you in my post, and I will not lose heart in the silent watchtower."