'Promise' in the Bible

After the number of the days in which ye searched the land, even forty days, each day for a year, shall ye bear your iniquities, even forty years, and ye shall know my breach of promise.

God is not a man who lies,or a son of man who changes His mind.Does He speak and not act,or promise and not fulfill?

"When a man makes a vow to the LORD, or swears an oath an obligation that is binding to himself he is not to break his word. Instead, he is to fulfill whatever promise came out of his mouth.'"

"If {she has a husband} while bound by her vows or a rash promise of her lips,

But if on the day her husband hears [of it], he forbids her, then he will nullify her vow that she is under, and the rash promise of her lips that she bound on herself; and Yahweh will forgive her.

If, while she had been living in her late or former husband's house, she makes a vow or a promise that binds her with an oath,