Matthew 10:6

but go rather to the lost sheep of the house of Israel.

Jeremiah 50:6

My people are lost sheep; their shepherds have caused them to go astray, they turned them away on the mountains: they went from mountain to hill, they forgot their resting-place.

Psalm 119:176

I have gone astray like a lost sheep: seek thy servant; for I have not forgotten thy commandments.

Isaiah 53:6

All we like sheep have gone astray, we have turned every one to his own way; and Jehovah hath laid upon him the iniquity of us all.

Acts 3:26

To you first God, having raised up his servant, has sent him, blessing you in turning each one of you from your wickedness.

Acts 13:46

And Paul and Barnabas spoke boldly and said, It was necessary that the word of God should be first spoken to you; but, since ye thrust it from you, and judge yourselves unworthy of eternal life, lo, we turn to the nations;

Jeremiah 50:17

Israel is a hunted sheep; the lions have driven him away: first the king of Assyria devoured him, and last this Nebuchadrezzar king of Babylon hath broken his bones.

Ezekiel 34:6

My sheep wandered through all the mountains, and upon every high hill, and my sheep have been scattered upon all the face of the earth, and there was none that searched, or that sought for them.

Ezekiel 34:8

As I live, saith the Lord Jehovah, verily because my sheep have been a prey, and my sheep have been meat to every beast of the field, because there was no shepherd, and my shepherds searched not for my flock, but the shepherds fed themselves, and fed not my flock,

Ezekiel 34:16

I will seek the lost, and bring again that which was driven away, and will bind up the broken, and will strengthen that which was sick; but I will destroy the fat and the strong: I will feed them with judgment.

Matthew 15:24-26

But he answering said, I have not been sent save to the lost sheep of Israel's house.

Matthew 18:10

See that ye do not despise one of these little ones; for I say unto you that their angels in the heavens continually behold the face of my Father who is in the heavens.

Luke 15:3-10

And he spoke to them this parable, saying,

Luke 24:47

and that repentance and remission of sins should be preached in his name to all the nations beginning at Jerusalem.

Acts 18:6

But as they opposed and spoke injuriously, he shook his clothes, and said to them, Your blood be upon your own head: I am pure; from henceforth I will go to the nations.

Acts 26:20

but have, first to those both in Damascus and Jerusalem, and to all the region of Judaea, and to the nations, announced that they should repent and turn to God, doing works worthy of repentance.

Acts 28:25-28

And being disagreed among themselves they left; Paul having spoken one word, Well spoke the Holy Spirit through Esaias the prophet to our fathers,

Romans 11:11-15

I say then, Have they stumbled in order that they might fall? Far be the thought: but by their fall there is salvation to the nations to provoke them to jealousy.

1 Peter 2:25

For ye were going astray as sheep, but have now returned to the shepherd and overseer of your souls.

Treasury of Scripture Knowledge

Summary

But go rather to the lost sheep of the house of Israel.

Bible References

Lost

Matthew 18:11
For the Son of man has come to save that which was lost.
Psalm 119:176
I have gone astray like a lost sheep: seek thy servant; for I have not forgotten thy commandments.
Isaiah 53:6
All we like sheep have gone astray, we have turned every one to his own way; and Jehovah hath laid upon him the iniquity of us all.
Jeremiah 50:6
My people are lost sheep; their shepherds have caused them to go astray, they turned them away on the mountains: they went from mountain to hill, they forgot their resting-place.
Ezekiel 34:6
My sheep wandered through all the mountains, and upon every high hill, and my sheep have been scattered upon all the face of the earth, and there was none that searched, or that sought for them.
Luke 15:3
And he spoke to them this parable, saying,
1 Peter 2:25
For ye were going astray as sheep, but have now returned to the shepherd and overseer of your souls.

General references

Ezekiel 3:4
And he said unto me, Son of man, go, get thee unto the house of Israel, and speak with my words unto them.
Matthew 18:11
For the Son of man has come to save that which was lost.
Luke 19:10
for the Son of man has come to seek and to save that which is lost.
John 4:4
And he must needs pass through Samaria.