Revelation 6:9-11 9
And when he had opened the fifth seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:
And they cried with a loud voice, saying, How long, O Lord, holy and true, dost thou not judge and avenge our blood on them that dwell on the earth?
And white robes were given unto 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.

Our God our help in ages past ¹
Where art Thou in this hour?
It seems tares of wickedness
Are all that are in flower

Under the shadow of Thy throne
We martyrs cry, “How long?”
And they who on the earth do moan,
How can they sing their song?

Before the hills in order stood,
Upon them sat a queen
Drunk with the blood of those who stood
‘Gainst Hell with joyous mien

Thy Word commands our flesh to dust,
From whence we’ll rise again
Our spirits wait for the unjust
To be removed from men

A thousand ages in Thy sight
And still we wait and cry
Although we know one day Thy might
Will bring Salvation nigh

The busy tribes of flesh and blood
Have yet to fill our throng
We rest in Thee for Thou art good
But Lord, O Lord! How long?

Time, like an ever rolling stream,
Now crests with firstborn blood
Thou art the Ark that can redeem
Thy remnant in the flood

Like flowery fields the nations stand
And wait Thy judgement call
Avenge us with Thine open hand
Our Rock, upon them fall

Our God our help in ages past
Where art Thou in this hour?
Thy righteousness upon us cast
We pray to see Thy power
 

1. “Our God, Our Help in Ages Past.” Wikipedia, the Free Encyclopedia. Accessed May 3, 2015. http://en.wikipedia.org/wiki/Our_God,_Our_Help_in_Ages_Past.