Matthew 15:24

but he answered, my commission was only to the lost sheep of the house of Israel.

Romans 15:8

for I tell you, that Jesus Christ was a minister to the Jews, to manifest the veracity of God in fulfilling the promises made to the fathers:

Matthew 10:5-6

Jesus made these twelve his missionaries, and gave them these instructions, don't go any where among the Gentiles, nor enter into any city of the Samaritans.

Matthew 9:36

but when he saw how the multitude were fatigued and dispers'd like so many sheep without their Pastors, he was moved with compassion, and said to his disciples,

Luke 15:4-6

who of you that has an hundred sheep, will not, upon losing one, leave the ninety nine in the desart, to go after that which is lost, till he finds it?

Acts 3:25-26

ye are the children of the prophets, and of the covenant which God made with our fathers, when he said to Abraham, "all the families of the earth shall be blessed in your posterity."

Acts 13:46

but Paul and Barnabas told them boldly, you indeed were the first, to whom the word of God was to be preach'd: but since you reject it, and judge your own selves unworthy of eternal life, be assur'd, we shall make the same offer 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
but when he saw how the multitude were fatigued and dispers'd like so many sheep without their Pastors, he was moved with compassion, and said to his disciples,
Matthew 10:5
Jesus made these twelve his missionaries, and gave them these instructions, don't go any where among the Gentiles, nor enter into any city of the Samaritans.
Luke 15:4
who of you that has an hundred sheep, will not, upon losing one, leave the ninety nine in the desart, to go after that which is lost, till he finds it?
Acts 3:25
ye are the children of the prophets, and of the covenant which God made with our fathers, when he said to Abraham, "all the families of the earth shall be blessed in your posterity."
Acts 13:46
but Paul and Barnabas told them boldly, you indeed were the first, to whom the word of God was to be preach'd: but since you reject it, and judge your own selves unworthy of eternal life, be assur'd, we shall make the same offer to the Gentiles:
Romans 15:8
for I tell you, that Jesus Christ was a minister to the Jews, to manifest the veracity of God in fulfilling the promises made to the fathers:

General references

Matthew 18:11
from whence the son of man is come, in order to save those that were lost.
Luke 19:10
for the son of man is come to seek, and to save that which was lost.