The entire song is a motet of Matthew 25:21: Serve bone et fidelis, quia in pauca fuisti, fidelis, fuisti fidelis, supra multa te constituam, constituam: intra, intra in gaudium Domini, in gaudium, in gaudium Domini Dei tui.
The entire song is a motet of Matthew 25:21: Serve bone et fidelis, quia in pauca fuisti, fidelis, fuisti fidelis, supra multa te constituam, constituam: intra, intra in gaudium Domini, in gaudium, in gaudium Domini Dei tui.