Matthew 5:11-12:

Blessed are ye, when men shall revile you, and persecute you, and shall say all manner of evil against you falsely, for my sake.
Rejoice, and be exceeding glad: for great is your reward in heaven: for so persecuted they the prophets which were before you.

See also:

Objection: If You Suffer More in This Life, You Get a Greater Reward in Heaven
Objection: Suffering Glorifies God (Romans 8:17)
Objection: We Need to Fulfill What Is Left of Christ’s Sufferings in the Earth (Colossians 1:24)