Verses with the word intercession in the Old Testament (4 verses):

Isaiah 53:12
Therefore will I divide him a portion with the great, and he shall divide the spoil with the strong; because he hath poured out his soul unto death: and he was numbered with the transgressors; and he bare the sin of many, and made intercession for the transgressors.

Jeremiah 7:16
Therefore pray not thou for this people, neither lift up cry nor prayer for them, neither make intercession to me: for I will not hear thee.

Jeremiah 27:18
But if they be prophets, and if the word of the LORD be with them, let them now make intercession to the LORD of hosts, that the vessels which are left in the house of the LORD, and in the house of the king of Judah, and at Jerusalem, go not to Babylon.

Jeremiah 36:25
Nevertheless Elnathan and Delaiah and Gemariah had made intercession to the king that he would not burn the roll: but he would not hear them.