When Abinadi finished his speech, King Noah told the priests to kill him.
2 But there was one among them whose name was Alma, he also being a descendant of Nephi. And he was a young man, and he believed the words which Abinadi had spoken, for he knew concerning the iniquity which Abinadi has testified against them; therefore he began to plead with the king that he would not be angry with Abinadi, but suffer that he might depart in peace.
But there was a man named Alma, who believed Abinadi.
Alma pleaded for Abinadi, but the king became even more angry, and ordered his servants to kill Alma.
But Alma escaped and hid for many days.
While in hiding he wrote down the words that Abinadi had spoken.
The king sent guards to throw Abinadi into prison.
8 For thou hast said that God himself should come down among the children of men; and now, for this cause thou shalt be put to death unless thou wilt recall all the words which thou hast spoken evil concerning me and my people.
9 Now Abinadi said unto him: I say unto you, I will not recall the words which I have spoken unto you concerning this people, for they are true; and that ye may know of their surety I have suffered myself that I have fallen into your hands.
After three days he sent for Abinadi and said to him,
Abinadi, we've decided that you should die for saying that God would come down from heaven.
But if you recant, we'll let you go.
10 Yea, and I will suffer even until death, and I will not recall my words, and they shall stand as a testimony against you. And if ye slay me ye will shed innocent blood, and this shall also stand as a testimony against you at the last day.
I won't recant to save my life.
If you kill me, you're killing an innocent man.
King Noah was afraid of what God would do to him if he killed Abinadi, so he was about to release him.
12 But the priests lifted up their voices against him, and began to accuse him, saying: He has reviled the king. Therefore the king was stirred up in anger against him, and he delivered him up that he might be slain.
But the priests said,
He has reviled the king and stirred up anger against him.
So he must be killed.
So they took him and bound him and scourged him with faggots.
Then they burned him to death.
But before he died, he gave a little speech, saying:
15 Behold, even as ye have done unto me, so shall it come to pass that thy seed shall cause that many shall suffer the pains that I do suffer, even the pains of death by fire; and this because they believe in the salvation of the Lord their God.
Your seed will cause many people to suffer for their beliefs.
And for that God will afflict you with diseases, you'll hunted by your enemies, and you'll be burned to death. 
20 And now, when Abinadi had said these words, he fell, having suffered death by fire; yea, having been put to death because he would not deny the commandments of God, having sealed the truth of his words by his death.
And with that, Abinadi died.