NET
13 But rejoice in the degree that you have shared in the sufferings of Christ, so that when his glory is revealed you may also rejoice and be glad.
Darby
13 but as ye have share in the sufferings of Christ, rejoice, that in the revelation of his glory also ye may rejoice with exultation.
KJV
13 But rejoice, inasmuch as ye are partakers of Christ's sufferings; that, when his glory shall be revealed, ye may be glad also with exceeding joy.