'Promised' in the Bible

For God, having promised to Abraham, since he had no greater to swear by, swore by himself,

Let us hold fast the confession of the hope unwavering, (for he is faithful who has promised;)

By faith also Sarah herself received strength for the conception of seed, and that beyond a seasonable age; since she counted him faithful who promised.

whose voice then shook the earth; but now he has promised, saying, Yet once will I shake not only the earth, but also the heaven.