8 These things being so, dearly beloved, keep watch over your own soul and cease to murmur against me. For the divine Scripture says: “Neither murmur ye [one against another] as some of them also murmured, and were destroyed of serpents.” Rather give way to the truth and love me who love both you and the truth. And may the God of peace, according to His mercy, grant to us that Satan may be bruised under the feet of Christians, and that every occasion of evil may be shunned, so that the bond of love and peace may not be rent asunder between us, or the preaching of the right faith be anywise hindered.
Source: Letters (New Advent)