1 Chronicles 27:33

And Ahithophel [was] an adviser to the king, and Hushai the Arkite [was] a friend of the king.

2 Samuel 15:12

Absalom sent for Ahithophel the Gilonite, the advisor of David, from his city Giloh, while he offered the sacrifices. The conspiracy {grew in strength}, and the people [were] going and {increasing} with Absalom.

2 Samuel 15:37

So Hushai the friend of David came to the city [as] Absalom was entering Jerusalem.

2 Samuel 15:32

It happened that as David [was] coming up to the summit where he used to worship God, suddenly Hushai the Arkite [was] there to meet him. His coat [was] torn and dirt [was] on his head.

2 Samuel 16:16-17

When Hushai the Arkite the friend of David came to Absalom, Hushai said to Absalom, "[Long] live the king, [long] live the king!"

2 Samuel 16:23

The counsel that Ahithophel gave in those days [was] regarded as when a man inquired of the word of God, so all the counsel of Ahithophel [was esteemed] both by David and by Absalom.

2 Samuel 17:23

When Ahithophel saw that his advice [was] not followed, he saddled the donkey, and he set out and went up to his house in his city. {After he set his house in order}, he hanged himself, and he died and was buried in the tomb of his ancestors.

Psalm 55:13

But [it is] you, a man my equal, my friend and confidant.

Zechariah 13:7

"O sword, awake against my shepherd, against [the] man [who is] my associate," {declares} Yahweh of hosts. "Strike the shepherd, so that the sheep may be scattered, and I will turn my hand against the small [ones].

Treasury of Scripture Knowledge

Summary

And Ahithophel was the king's counseller: and Hushai the Archite was the king's companion:

Bible References

Ahithophel

2 Samuel 15:12
Absalom sent for Ahithophel the Gilonite, the advisor of David, from his city Giloh, while he offered the sacrifices. The conspiracy {grew in strength}, and the people [were] going and {increasing} with Absalom.
2 Samuel 16:23
The counsel that Ahithophel gave in those days [was] regarded as when a man inquired of the word of God, so all the counsel of Ahithophel [was esteemed] both by David and by Absalom.
2 Samuel 17:23
When Ahithophel saw that his advice [was] not followed, he saddled the donkey, and he set out and went up to his house in his city. {After he set his house in order}, he hanged himself, and he died and was buried in the tomb of his ancestors.

Hushai

2 Samuel 15:32
It happened that as David [was] coming up to the summit where he used to worship God, suddenly Hushai the Arkite [was] there to meet him. His coat [was] torn and dirt [was] on his head.
2 Samuel 16:16
When Hushai the Arkite the friend of David came to Absalom, Hushai said to Absalom, "[Long] live the king, [long] live the king!"

Companion

2 Samuel 16:17
Absalom said to Hushai, "This [is] your loyal love with your friend? Why did you not go with your friend?"
Psalm 55:13
But [it is] you, a man my equal, my friend and confidant.
Zechariah 13:7
"O sword, awake against my shepherd, against [the] man [who is] my associate," {declares} Yahweh of hosts. "Strike the shepherd, so that the sheep may be scattered, and I will turn my hand against the small [ones].