Psalm 81:3 in the World English Bible
Blow the trumpet at the New Moon, at the full moon, on our feast day.
Context
2 Take a psalm, and bring hither the timbrel, the pleasant harp with the psaltery.
3 Blow up the trumpet in the new moon, in the time appointed, on our solemn feast day.
4 For this was a statute for Israel, and a law of the God of Jacob.