2 verses have
firm
in Edition Clear Qur'an by Talal Itani / Ibrahim (Abraham)

14:24Do you not see how God presents a parable? A good word is like a good tree—its root is firm, and its branches are in the sky.

14:27God gives firmness to those who believe, with the firm word, in this life, and in the Hereafter. And God leads the wicked astray. God does whatever He wills.