1 Thessalonians 5:16-18 says:
16Always be full of joy.17Never stop praying.18Give thanks [to God] at all times. That is what God wants for you in Christ Jesus. (Easy-to-Read Version)
King James Version: 16Rejoice evermore. 17Pray without ceasing. 18In every thing give thanks: for this is the will of God in Christ Jesus concerning you.