Jonah 2:10, Mt 12:39-41, Mt 16:4, 1 Cor 15:3-4

In the Old Testament, the prophet Jonah was swallowed by a large fish and vomited again from the fish three days later. (Jonah 1:17, Jonah 2:10)

Jonah 1:17 Now the Lord had prepared a great fish to swallow up Jonah. And Jonah was in the belly of the fish three days and three nights.

Jonah 2:10 And the Lord spake unto the fish, and it vomited out Jonah upon the dry land.

The sign of the Old Testament prophet Jonah was to foreshadow Christ's death and resurrection three days later. (Mt 12:39-41, Mt 16:4)

Mt 12:39 But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas:

40 For as Jonas was three days and three nights in the whale's belly; so shall the Son of man be three days and three nights in the heart of the earth.

41 The men of Nineveh shall rise in judgment with this generation, and shall condemn it: because they repented at the preaching of Jonas; and, behold, a greater than Jonas is here.

Mt 16:4 A wicked and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonas. And he left them, and departed.

As the Old Testament prophesied, Jesus, the Christ, died and rose from the dead on the third day. (1 Corinthians 15:3-4)

1 Corinthians 15:3 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; 4 And that he was buried, and that he rose again the third day according to the scriptures: