Romans 9:15

I will commiserate whomsoever I commiserate, and I will have compassion upon whomsoever I have compassion.

Exodus 33:19

And he will say, I will cause all my good to pass by before thee, and I called upon the name of Jehovah before thee; and I compassionated whom I will compassionate, and I pitied whom I will pity.

Romans 9:16

Surely then, not of him Willing, nor of him running, but of God commiserating.

Romans 9:18-19

Surely then, whom he will he commiserates, and whom he will he hardens.

Exodus 34:6-7

And Jehovah will pass by before him, and Jehovah will call, Jehovah God merciful and compassionate, deferring anger, and much in kindness and truth,

Isaiah 27:11

In its harvest being dried up, women shall break it off in coming, illuminating it: for it is a people not understanding: for this he making them will not compassionate them, and he forming them will not have mercy upon them.

Micah 7:18

Who is God as thee, lifting up iniquity and passing by transgression to the remnant of his inheritance? he held not his anger forever for he delighted in mercy.

Treasury of Scripture Knowledge

Summary

For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.

Bible References

I will have

Romans 9:16
Surely then, not of him Willing, nor of him running, but of God commiserating.
Exodus 33:19
And he will say, I will cause all my good to pass by before thee, and I called upon the name of Jehovah before thee; and I compassionated whom I will compassionate, and I pitied whom I will pity.
Exodus 34:6
And Jehovah will pass by before him, and Jehovah will call, Jehovah God merciful and compassionate, deferring anger, and much in kindness and truth,
Isaiah 27:11
In its harvest being dried up, women shall break it off in coming, illuminating it: for it is a people not understanding: for this he making them will not compassionate them, and he forming them will not have mercy upon them.
Micah 7:18
Who is God as thee, lifting up iniquity and passing by transgression to the remnant of his inheritance? he held not his anger forever for he delighted in mercy.