“This know also, that in the last days perilous times shall come.”2 Timothy 3:1 KJV
See then that ye walk circumspectly, not as fools, but as wise, redeeming the time, because the days are evil, and take unto you the whole armour of God, that ye may be able to withstand in the evil day.
Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils; Speaking lies in hypocrisy; having their conscience seared with a hot iron;
1 Timothy 4:1-2 KJV
As ye know how we exhorted and comforted and charged every one of you, as a father doth his children, That ye would walk worthy of God, who hath called you unto his kingdom and glory. For this cause also thank we God without ceasing, because, when ye received the word of God which ye heard of us, ye received it not as the word of men, but as it is in truth, the word of God, which effectually worketh also in you that believe.
1 Thessalonians 2:11-13 KJV