Revelation 2:10-11

"Do not be afraid of what you are about to suffer. I tell you, the devil will put some of you in prison to test you, and you will suffer persecution for ten days. Be faithful, even to the point of death, and I will give you the crown of life. He who has an ear, let him hear what the Spirit says to the churches. He who overcomes will not be hurt at all by the second death."

the devil will put some of you in prison to test you
Revelation 3:10 "Since you have kept my command to endure patiently, I will also keep you from the hour of trial that is going to come upon the whole world to test those who live on the earth." (Philadelphia)

you will suffer persecution for ten days
Daniel 1:12 "Please test your servants for ten days: Give us nothing but vegetables to eat and water to drink."
Daniel 1:14 So he agreed to do this and tested them for ten days.
John 15:20 "Remember the words I spoke to you: 'No servant is greater than his master.' If they persecuted me, they will persecute you also. If they obeyed my teaching, they will obey yours also."
2 Timothy 3:12 In fact, everyone who wants to live a godly life in Christ Jesus will be persecuted, ...

be faithful
Revelation 2:13 "I know where you live--where Satan has his throne. Yet you remain true to my name. You did not renounce your faith in me, even in the days of Antipas, my faithful witness, who was put to death in your city--where Satan lives." (Pergamum)
Revelation 17:14 "They will make war against the Lamb, but the Lamb will overcome them because he is Lord of lords and King of kings--and with him will be his called, chosen and faithful followers."

I will give you the crown of life
Matthew 10:22 "All men will hate you because of me, but he who stands firm to the end will be saved."
1 Corinthians 9:25 Everyone who competes in the games goes into strict training. They do it to get a crown that will not last; but we do it to get a crown that will last forever.

He who has an ear, let him hear
Revelation 2:7 "He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, I will give the right to eat from the tree of life, which is in the paradise of God." (Ephesus)

He who overcomes will not be hurt at all by the second death
Revelation 20:6 Blessed and holy are those who have part in the first resurrection. The second death has no power over them, but they will be priests of God and of Christ and will reign with him for a thousand years.
Revelation 20:14 Then death and Hades were thrown into the lake of fire. The lake of fire is the second death.
Revelation 21:8 "But the cowardly, the unbelieving, the vile, the murderers, the sexually immoral, those who practice magic arts, the idolaters and all liars--their place will be in the fiery lake of burning sulfur. This is the second death."

NOTES:
Crown of life - Revelation 3:11; 4:4; 4:10; 6:2; 9:7; 12:1; 12:3; 13:1; 14:14; 19:12

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.