exhortation

/ˌɛɡzɔːrˈteɪʃən/
noun
  1. An act of strongly encouraging or urging someone to do something.
    • The speech was a passionate exhortation for everyone to vote in the election.
    • Her exhortation to the students to study harder was met with mixed reactions.
    • The coach's exhortation before the game inspired the players to give their best.