Matthew 6:2

6:2 Thus whenever you do charitable giving, do not blow a trumpet before you, as the hypocrites do in synagogues and on streets so that people will praise them. I tell you the truth, they have their reward.

Matthew 24:31

24:31 And he will send his angels with a loud trumpet blast, and they will gather his elect from the four winds, from one end of heaven to the other.