Titus 3:4-7
"But when the goodness and loving kindness of God our Savior appeared, he saved us, not because of works done by us in righteousness, but according to his mercy, by the washing of regeneration and renewal of the Holy Spirit, whom he poured out on us richly through Jesus Christ our Savior, so that being justified by his grace we might become heirs according to the hope of eternal life."
The trinity of salvation: God the Father manifested goodness and love; Christ saved us; the Spirit renews through regeneration. Salvation is not by works of righteousness (ergon en dikaiosyne), but by divine mercy. The 'washing of regeneration' (loutrou palingenesias) likely alludes to baptism as a sign of regeneration by the Spirit.