…there are three reasons why we can affirm the Spirit’s indwelling of OT saints: regeneration, sanctification, and empowerment.
via OT Saints: Indwelt by the Spirit?.
I was actually just thinking about this the other night, while reading through Ezekiel 2-3. I’d heard the argument before that Old Testament saints were NOT indwelt by the Spirit ever, that that Spirit merely “came upon” them.
The text, however, shows otherwise:
Ezekiel 2:22 And as he spoke to me, the Spirit entered into me and set me on my feet, and I heard him speaking to me. (ESV)
Ezekiel 3:2424 But the Spirit entered into me and set me on my feet, and he spoke with me and said to me, “Go, shut yourself within your house. (ESV)