The Long Āgama Sūtra 27.10

27.10

時，王又命勇健大將而告之曰：「今十五日月滿時，其夜清明，與晝無異，當何所為作？」

The king also summoned a great and heroic general. He asked him, “Now is the fifteenth day full moon. The night is clear and bright, and the day was no different. What shall we do?”