Irenaeus Against Heresies Book IV And the angels, in like manner, announced tidings of great joy to the shepherds who were keeping watch by night.[73] Tertullian On the Flesh of Christ Let the shepherds take better care of their flock,[17] The Gospel of Pseudo-Matthew And some shepherds also affirmed that they had seen angels singing a hymn at midnight, praising and blessing the God of heaven, and saying: There has been born the Saviour of all, who is Christ the Lord, in whom salvation shall be brought back to Israel.[32]