NET
13 Then the sixth angel blew his trumpet, and I heard a single voice coming from the horns on the golden altar that is before God,
Darby
13 And the sixth angel sounded [his] trumpet: and I heard a voice from the four horns of the golden altar which [is] before God,
KJV
13 And the sixth angel sounded, and I heard a voice from the four horns of the golden altar which is before God,