Acts 13:46
“Then Paul and Barnabas waxed bold, and said, It was necessary that the word of God should first have been spoken to you: but seeing ye put it from you, and judge yourselves unworthy of everlasting life, lo, we turn to the Gentiles.”
And the next sabbath day came almost the whole city together to hear the word of God.
But when the Jews saw the multitudes, they were filled with envy, and spake against those things which were spoken by Paul, contradicting and blaspheming.
Then Paul and Barnabas waxed bold, and said, It was necessary that the word of God should first have been spoken to you: but seeing ye put it from you, and judge yourselves unworthy of everlasting life, lo, we turn to the Gentiles.
For so hath the Lord commanded us, saying, I have set thee to be a light of the Gentiles, that thou shouldest be for salvation unto the ends of the earth.
And when the Gentiles heard this, they were glad, and glorified the word of the Lord: and as many as were ordained to eternal life believed.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:”
“He that believeth and is baptized shall be saved; but he that believeth not shall be damned.”
“But he answered and said, I am not sent but unto the lost sheep of the house of Israel.”
“Be it known therefore unto you, that the salvation of God is sent unto the Gentiles, and that they will hear it.”
“Therefore say I unto you, The kingdom of God shall be taken from you, and given to a nation bringing forth the fruits thereof.”