'A quiver' signifies the doctrinal matters of good and truth.

In Isaiah 49:2, this signifies the Word.

(Odkazy: Apocalypse Explained 357)

367. And to him was given a great sword, signifies by means of falsities. This is evident from the signification of "sword" [machaera seu gladius], as being truth fighting against falsity; and in a contrary sense, falsity fighting against truth and the destruction of truth (See above, n. 131); here it means falsity fighting against truth and destroying it; for it is said just before "that they should slay one another," which signifies the falsification and extinction of truths. In the Word "sword," "short sword," and "long sword," are mentioned; and "sword" signifies spiritual combat in general; "short sword" the combat of truth from good or of falsity from evil; and "long sword" the combat of truth from doctrine against falsity, or of falsity from doctrine against truth; for a "short sword" is for the arm, and the "long sword" is said to go forth out of the mouth (as in Revelation 1:16; 2:12, 16; 19:15, 21).