Matthew 24:10-14, 24

At that time many will be offended and repelled [by their association with Me] and will fall away [from the One whom they should trust] and will betray one another [handing over believers to their persecutors] and will hate one another. Many false prophets will appear and mislead many. Because lawlessness is increased, the love of most people will grow cold. But the one who endures and bears up [under suffering] to the end will be saved. This good news of the kingdom [the gospel] will be preached throughout the whole world as a testimony to all the nations, and then the end [of the age] will come.

For false Christs and false prophets will appear and they will provide great signs and wonders, so as to deceive, if possible, even the elect (God’s chosen ones).