Matthew 15:24

But He, answering, said, "I was not sent, except to the lost sheep of the house of Israel."

Romans 15:8

For I say that Christ hath become a minister of the circumcision, in behalf of God's truth, that He might confirm the promises made to the fathers;

Matthew 10:5-6

These twelve Jesus sent forth, having charged them, saying, "Go not into any way of the gentiles, and enter not into a city of the Samaritans;

Matthew 9:36

And, seeing the multitudes, He was moved with compassion for them, because they were harassed and scattered, as sheep having no shepherd.

Luke 15:4-6

"What man of you, having a hundred sheep, and losing one of them, does not leave behind the ninety and nine in the wilderness, and go after the lost one, until he finds it?

Acts 3:25-26

Ye are the sons of the prophets, and of the covenant which God made with your fathers, saying to Abraham, 'And in your Seed shall all the families of the earth be blessed.'

Acts 13:46

Speaking boldly, both Paul and Barnabas said, "It was necessary that the word of God should first be spoken to you. Inasmuch as ye thrust it away from you, and judge yourselves unworthy of eternal life, behold, we turn to the gentiles;

Treasury of Scripture Knowledge

Summary

But he answered and said, I am not sent but unto the lost sheep of the house of Israel.

General references

Bible References

I am not

Matthew 9:36
And, seeing the multitudes, He was moved with compassion for them, because they were harassed and scattered, as sheep having no shepherd.
Matthew 10:5
These twelve Jesus sent forth, having charged them, saying, "Go not into any way of the gentiles, and enter not into a city of the Samaritans;
Luke 15:4
"What man of you, having a hundred sheep, and losing one of them, does not leave behind the ninety and nine in the wilderness, and go after the lost one, until he finds it?
Acts 3:25
Ye are the sons of the prophets, and of the covenant which God made with your fathers, saying to Abraham, 'And in your Seed shall all the families of the earth be blessed.'
Acts 13:46
Speaking boldly, both Paul and Barnabas said, "It was necessary that the word of God should first be spoken to you. Inasmuch as ye thrust it away from you, and judge yourselves unworthy of eternal life, behold, we turn to the gentiles;
Romans 15:8
For I say that Christ hath become a minister of the circumcision, in behalf of God's truth, that He might confirm the promises made to the fathers;

General references

Matthew 18:11
["For the Son of Man came to save that which was lost."]
Luke 19:10
for the Son of Man came to seek and to save that which is lost."