Matthew 10:22: "And you will be hated by all for My name's sake. But he who endures to the end will be saved."
Matthew 24:13: "But he who endures to the end shall be saved." (compare to Matthew 10:22)
Mark 13:13: "And you will be hated by all for My name's sake. But he who endures to the end shall be saved."
Compare to Daniel 12:12-13: "12Blessed is he who waits, and comes to the one thousand three hundred and thirty-five days. 13But you, go your way till the end; for you shall rest, and will arise to your inheritance at the end of the days."
Also Matthew 10:22 and Matthew 24:13 (see above)
Also Revelation 2:10: "Do not fear any of those things which you are about to suffer. Indeed, the devil is about to throw some of you into prison, that you may be tested, and you will have tribulation ten days. Be faithful until death, and I will give you the crown of life."
Luke 13:23-30: "23 Then one said to Him, "Lord, are there few who are saved?" And He said to them, 24 "Strive to enter through the narrow gate, for many, I say to you, will seek to enter and will not be able. 25 When once the Master of the house has risen up and shut the door, and you begin to stand outside and knock at the door, saying, 'Lord, Lord, open for us,' and He will answer and say to you, 'I do not know you, where you are from,' 26 then you will begin to say, 'We ate and drank in Your presence, and You taught in our streets.' 27 But He will say, 'I tell you I do not know you, where you are from. Depart from Me, all you workers of iniquity.' 28 There will be weeping and gnashing of teeth, when you see Abraham and Isaac and Jacob and all the prophets in the kingdom of God, and yourselves thrust out. 29 They will come from the east and the west, from the north and the south, and sit down in the kingdom of God. 30 And indeed there are last who will be first, and there are first who will be last." [emphasis added]
John 6:27 "Do not labor for the food which perishes, but for the food which endures to everlasting life, which the Son of Man will give you, because God the Father has set His seal on Him.