Matthew 12:32
"And whosoever speaketh a word against the Son of man, it shall be forgiven him: but whosoever speaketh against the Holy Ghost, it shall not be forgiven him, neither in this world, neither in the world to come."
Cross References (ranked by relevance)
But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation:
(But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)
Who was before a blasphemer, and a persecutor, and injurious: but I obtained mercy, because I did it ignorantly in unbelief.
Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.
Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;
And whosoever shall speak a word against the Son of man, it shall be forgiven him: but unto him that blasphemeth against the Holy Ghost it shall not be forgiven.
Repent ye therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord;
But the hypocrites in heart heap up wrath: they cry not when he bindeth them.
Far above all principality, and power, and might, and dominion, and every name that is named, not only in this world, but also in that which is to come:
Then said Jesus, Father, forgive them; for they know not what they do. And they parted his raiment, and cast lots.
But he shall receive an hundredfold now in this time, houses, and brethren, and sisters, and mothers, and children, and lands, with persecutions; and in the world to come eternal life.
And there was much murmuring among the people concerning him: for some said, He is a good man: others said, Nay; but he deceiveth the people.
This is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief.
The Son of man is come eating and drinking; and ye say, Behold a gluttonous man, and a winebibber, a friend of publicans and sinners!
They answered and said unto him, Art thou also of Galilee? Search, and look: for out of Galilee ariseth no prophet.
The Son of man came eating and drinking, and they say, Behold a man gluttonous, and a winebibber, a friend of publicans and sinners. But wisdom is justified of her children.