Definition of "raigne"

[I]f it may bee lawfull to iudge or giue any ſentence thereof, it [the author of the book of Ruth] was either Samuell, or ſome other godly Prophet vnder the raigne of Saule, [...]

1596, Edward Topsell, The Reward of Religion: Deliuered in Sundry Lectures Vpon the Booke of Ruth : Wherein the Godly May See Their Dayly Both Inward and Outward Trials : with the Presence of God to Assist Them, and His Mercies to Recompence Them [...]‎, London: John Windet, published 1601, page 1