Wahyu 9:13

9:13 Then ¹  the sixth angel blew his trumpet, and I heard a single voice coming from the ²  horns on the golden altar that is before God,

Wahyu 17:9

17:9 (This requires ³  a mind that has wisdom.) The seven heads are seven mountains ⁴  the woman sits on. They are also seven kings:

[9:13]  ¹ tn Here καί (kai) has been translated as “then” to indicate the implied sequence of events within the vision.

[9:13]  ² tc ‡ Several key mss (Ì⁴⁷ א¹ A 0207 1611 2053 2344 pc lat sy^h co) lack the word τεσσάρων (tessarwn, “four”) before κεράτων (keratwn, “horns”). The word seems to have been added by scribes because a “horned” altar (described in the OT [Exod 30:2, 10]) could have only four “horns” or projections at the corners. NA²⁷ includes the word in brackets, indicating doubts as to its authenticity.

[17:9]  ³ tn Grk “Here is the mind that has wisdom.”

[17:9]  ⁴ tn It is important to note that the height of “mountains” versus “hills” or other topographical terms is somewhat relative. In terms of Palestinian topography, Mount Tabor (traditionally regarded as the mount of transfiguration) is some 1,800 ft (550 m) above sea level, while the Mount of Olives is only some 100 ft (30 m) higher than Jerusalem.