Psalm 13:1-6 (ESV)
To the choirmaster. A Psalm of David.
How long, O Lord? Will you forget me forever?
How long will you hide your face from me?
[2] How long must I take counsel in my soul
and have sorrow in my heart all the day?
How long shall my enemy be exalted over me?
[3] Consider and answer me, O Lord my God;
light up my eyes, lest I sleep the sleep of death,
[4] lest my enemy say, "I have prevailed over him,"
lest my foes rejoice because I am shaken.
[5] But I have trusted in your steadfast love;
my heart shall rejoice in your salvation.
[6] I will sing to the Lord,
because he has dealt bountifully with me.
Rev. 6:9-11 (ESV)
When he opened the fifth seal, I saw under the altar the souls of those who had been slain for the word of God and for the witness they had borne. [10] They cried out with a loud voice, "O Sovereign Lord, holy and true, how long before you will judge and avenge our blood on those who dwell on the earth?" [11] Then they were each given a white robe and told to rest a little longer, until the number of their fellow servants and their brothers should be complete, who were to be killed as they themselves had been.