Ephesians 1:13
And you also were included in Christ when you heard the message of truth, the gospel of your salvation — when you believed, you were marked in him with a seal, the promised Holy Spirit — the Gentile believers (hymeis, 'you also') heard the word of truth (logos tēs alētheias), the gospel itself, and believing (pisteuō), they received the sphragis (seal), the Holy Spirit as the authenticating mark of belonging to Christ.