Psalm 50:4-6

He summons the heavens above, and the earth, that he may judge his people: "Gather to me this consecrated people, who made a covenant with me by sacrifice." And the heavens proclaim his righteousness, for he is a God of justice.

He summons the heavens above, and the earth 
Deuteronomy 4:26  I call the heavens and the earth as witnesses against you this day that you will quickly perish from the land that you are crossing the Jordan to possess. You will not live there long but will certainly be destroyed.
Deuteronomy 31:28  Assemble before me all the elders of your tribes and all your officials, so that I can speak these words in their hearing and call the heavens and the earth to testify against them.
Isaiah 1:2  Hear me, you heavens! Listen, earth! For the LORD has spoken: "I reared children and brought them up, but they have rebelled against me."

that he may judge his people 
Hebrews 10:30  For we know him who said, "It is mine to avenge; I will repay," (Deuteronomy 32:35) and again, "The Lord will judge his people." (Deuteronomy 32:36)

Gather to me this consecrated people 
Deuteronomy 7:6  For you are a people holy to the LORD your God. The LORD your God has chosen you out of all the peoples on the face of the earth to be his people, his treasured possession.
Psalm 18:25-26  To the faithful you show yourself faithful, to the blameless you show yourself blameless, to the pure you show yourself pure, but to the devious you show yourself shrewd.

who made a covenant with me by sacrifice 
Exodus 24:7  Then he (Moses) took the Book of the Covenant and read it to the people. They responded, "We will do everything the LORD has said; we will obey."
2 Chronicles 6:11  "There I (Solomon) have placed the ark, in which is the covenant of the LORD that he made with the people of Israel."

And the heavens proclaim his righteousness 
Psalm 19:1  The heavens declare the glory of God; the skies proclaim the work of his hands.

for he is a God of justice 
Genesis 16:5  Then Sarai said to Abram, "You are responsible for the wrong I am suffering. I put my slave in your arms, and now she knows she is pregnant, she despises me. May the LORD judge between you and me."
Job 9:15  "Though I were innocent, I could not answer him; I could only plead with my Judge for mercy."

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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