Joel 2:15

15 Let a horn be sounded in Zion, let a time be fixed for going without food, have a holy meeting:

Joel 2:15 Meaning and Commentary

Joel 2:15

Blow the trumpet in Zion
For the calling of the people together to religious duties, which was one use of the silver trumpets made for and blows by the priests, ( Numbers 10:2 Numbers 10:3 Numbers 10:8 Numbers 10:10 ) ; sanctify a fast, call a solemn assembly; (See Gill on Joel 1:14).

Joel 2:15 In-Context

13 Let your hearts be broken, and not your clothing, and come back to the Lord your God: for he is full of grace and pity, slow to be angry and great in mercy, ready to be turned from his purpose of punishment.

14 May it not be that he will again let his purpose be changed and let a blessing come after him, even a meal offering and a drink offering for the Lord your God?

15 Let a horn be sounded in Zion, let a time be fixed for going without food, have a holy meeting:

16 Get the people together, make the mass of the people holy, send for the old men, get together the children and babies at the breast: let the newly married man come out of his room and the bride from her tent.

17 Let the priests, the servants of the Lord, be weeping between the covered way and the altar, and let them say, Have mercy on your people, O Lord, do not give up your heritage to shame, so that the nations become their rulers: why let them say among the peoples, Where is their God?