And God said unto Noah, The end of all flesh is come before Me; for the earth is filled with violence through them; and, behold, I will destroy them with the earth… Thus did Noah; according to all that God commanded him, so did he. -Genesis 6:13, 22

Faith is to be exercised about the commandments; for David says, “I have believed Thy commandments.” Faith is to be exercised upon the promises; for there its sweetest business lies. But, believe me, you cannot have faith in the promise unless you are prepared to have faith in the threatening also. If you truly believe a man, you believe all that he says. He who does not believe that God will punish sin, will not believe that God will pardon it through the atoning blood. He who does not believe that God will cast unbelievers into hell, will not be sure that he will take believers into heaven. If we doubt God’s Word about one thing, we shall have small confidence in it upon another thing. Sincere faith in God must treat all God’s Word alike; for the faith which accepts one word of God and rejects another is evidently not faith in God, but faith in our own judgment, faith in our own taste. Only that is true faith which believes everything that is revealed by the Holy Spirit, whether it be joyous or distressing. Noah had, in this case, received a promise; but, as the dark background to it, he had listened to the terrible threatening that God would destroy all living things with a flood: his faith believed both the warning and the promise. If he had not believed the threat, he would not have prepared an ark, and so would not have received the promise…With solemn awe believe the bitter word of judgment, that the word of mercy may be sweet to you. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2147.cfm