1 Kings 22:2

and it cometh to pass in the third year, that Jehoshaphat king of Judah cometh down unto the king of Israel,

1 Kings 15:24

and Asa lieth with his fathers, and is buried with his fathers in the city of David his father, and Jehoshaphat his son reigneth in his stead.

1 Kings 22:1

And they sit still three years, there is no war between Aram and Israel,

1 Kings 22:41

And Jehoshaphat son of Asa hath reigned over Judah in the fourth year of Ahab king of Israel,

1 Kings 22:44

And Jehoshaphat maketh peace with the king of Israel;

2 Kings 8:18

And he walketh in the way of the kings of Israel, as did the house of Ahab, for a daughter of Ahab was to him for a wife, and he doth the evil thing in the eyes of Jehovah,

2 Chronicles 18:1-27

And Jehoshaphat hath riches and honour in abundance, and joineth affinity to Ahab,

Matthew 12:40

for, as Jonah was in the belly of the fish three days and three nights, so shall the Son of Man be in the heart of the earth three days and three nights.

Matthew 16:21

From that time began Jesus to shew to his disciples that it is necessary for him to go away to Jerusalem, and to suffer many things from the elders, and chief priests, and scribes, and to be put to death, and the third day to rise.

Treasury of Scripture Knowledge

Summary

And it came to pass in the third year, that Jehoshaphat the king of Judah came down to the king of Israel.

Bible References

In the third

1 Kings 22:1
And they sit still three years, there is no war between Aram and Israel,
Matthew 12:40
for, as Jonah was in the belly of the fish three days and three nights, so shall the Son of Man be in the heart of the earth three days and three nights.
Matthew 16:21
From that time began Jesus to shew to his disciples that it is necessary for him to go away to Jerusalem, and to suffer many things from the elders, and chief priests, and scribes, and to be put to death, and the third day to rise.

Jehoshaphat

1 Kings 22:41
And Jehoshaphat son of Asa hath reigned over Judah in the fourth year of Ahab king of Israel,
1 Kings 15:24
and Asa lieth with his fathers, and is buried with his fathers in the city of David his father, and Jehoshaphat his son reigneth in his stead.
2 Kings 8:18
And he walketh in the way of the kings of Israel, as did the house of Ahab, for a daughter of Ahab was to him for a wife, and he doth the evil thing in the eyes of Jehovah,
2 Chronicles 18:1
And Jehoshaphat hath riches and honour in abundance, and joineth affinity to Ahab,