With a godly jealousy (theou zēlōi). Instrumental case of zēlos. With a jealousy of God.
I espoused (hērmosamēn). First aorist middle indicative of harmozō, old verb to join, to fit together (from harmos, joint). Common for betrothed, though only here in N.T. The middle voice indicates Paul’s interest in the matter. Paul treats the Corinthians as his bride.