מוסר אויף חבקוק 2:3

Moreover, He told us,¹⁰Habbakuk 2:3 “Though he may tarry, wait for him.” This means, “If you think that the promise that HaShem swore unto Israel will, God forbid, be abrogated, know that this is not so, but instead, wait for him.” This is like a person who waits for something that he knows will surely come to pass, as the verse states, “Grass withers and blossom wilts, but the word of our God stands forever,” and as the above verse concludes, “He shall surely come without delay.”