In the OT the Holy Spirit did not dwell in believers. He would come upon specific individuals at specific times but He did not live within them. From Pentecost on the Holy Spirit came to live in every born again believer.
Here are just a few examples
Num 11:25 And the LORD came down in a cloud, and spake unto him, and took of the spirit that [was] upon him, and gave [it] unto the seventy elders: and it came to pass, [that], when the spirit rested upon them, they prophesied, and did not cease.
Jdg 3:10 And the Spirit of the LORD came upon him, and he judged Israel, and went out to war: and the LORD delivered Chushanrishathaim king of Mesopotamia into his hand; and his hand prevailed against Chushanrishathaim.
Jdg 6:34 But the Spirit of the LORD came upon Gideon, and he blew a trumpet; and Abiezer was gathered after him.
Jdg 11:29 Then the Spirit of the LORD came upon Jephthah, and he passed over Gilead, and Manasseh, and passed over Mizpeh of Gilead, and from Mizpeh of Gilead he passed over [unto] the children of Ammon.
Jdg 14:6 And the Spirit of the LORD came mightily upon him, and he rent him as he would have rent a kid, and [he had] nothing in his hand: but he told not his father or his mother what he had done.
Jdg 14:19 And the Spirit of the LORD came upon him, and he went down to Ashkelon, and slew thirty men of them, and took their spoil, and gave change of garments unto them which expounded the riddle. And his anger was kindled, and he went up to his father's house.
Jdg 15:14 [And] when he came unto Lehi, the Philistines shouted against him: and the Spirit of the LORD came mightily upon him, and the cords that [were] upon his arms became as flax that was burnt with fire, and his bands loosed from off his hands.
1Sa 16:13 Then Samuel took the horn of oil, and anointed him in the midst of his brethren: and the Spirit of the LORD came upon David from that day forward. So Samuel rose up, and went to Ramah.
2Ch 24:20 And the Spirit of God came upon Zechariah the son of Jehoiada the priest, which stood above the people, and said unto them, Thus saith God, Why transgress ye the commandments of the LORD, that ye cannot prosper? because ye have forsaken the LORD, he hath also forsaken you.
Promise of the indwelling Comforter
Jhn 14:17 [Even] the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.