Matthew Poole and continuators on Revelation 6:11

11 And white robes were given to every one of them, and it was said unto them, that they should rest yet for a little season , until their fellow-servants also and their brethren that should be killed, as they were , should be fulfilled .

White Robes of Glory; for the white Robes of Christ's Righteousness, and of an Holy Life, were by them put on before they were slain,

That they should be satisfied, and acquiesce in God's Dispensations.

For God had yet more faithful Witnesses to be martyred (though not in such Flocks as before,) who should die for the same Faith and Profession.

When the number of those his Martyrs should be compleated, he would avenge their Blood upon their Enemies.

Marginal references: Chap. 3.4, 5. & 7.9, 14.