Revelation 20:7

7AndΚαὶwhenὅτανshall have been completedτελεσθῇtheτὰthousandχίλιαyearsἔτη,will be releasedλυθήσεταιὁSatanΣατανᾶςout ofἐκtheτῆςprisonφυλακῆςof himαὐτοῦ,

And when the thousand years should be completed, Satan will be released out of his prison,