15 Blow the trumpet in Zion,
declare a holy fast,
call a sacred assembly.
16 Gather the people,
consecrate the assembly;
bring together the elders,
gather the children,
those nursing at the breast.
Let the bridegroom leave his room
and the bride her chamber.
17 Let the priests, who minister before the LORD,
weep between the temple porch and the altar.
Let them say, ‘Spare your people, O LORD.
Do not make your inheritance an object of scorn,
a byword among the nations.
Why should they say among the peoples,
‘Where is their God?’‘ (Joel 2:15-17)

10 Also at your times of rejoicing—your appointed feasts and New Moon festivals—you are to sound the trumpets over your burnt offerings and fellowship offerings, and they will be a memorial for you before your God. I am the LORD your God.” (Numbers 10:10)