Halakhah zu Tehillim 111:1

Before you say the “Birkat Hagomel”[the Blessing of those who overcome a danger] you say the verse (Psalms 111, 1) : “I praise the Lord with all my heart in the assembled congregation of the upright”, and afterwards you bless by saying “Blessed Thou Lord, King of the Universe, showing goodness to us beyond our merits and bestowing favour upon me” , the congregation responds: “May God who has been gracious to you, continue to be gracious to you selah”, and he says after them: “Amen, may this be God’s will.”