Almighty God, you upheld your servant Irenaeus with strength to maintain the truth against every blast of vain doctrine: Keep us, we pray, steadfast in your true religion, that in constancy and peace we may walk in the way that leads to eternal life; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, now and for ever. Amen.
For more information about St Irenaeus, see Holy Women, Holy Men.