'Gospel's' in the Bible

For whosoever will save his life shall lose it; but whosoever shall lose his life for my sake and the gospel's, the same shall save it.

And Jesus answered and said, Verily I say unto you, There is no man that hath left house, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my sake, and the gospel's,

And this I do for the gospel's sake, that I might be partaker thereof with you.

I would have chosen to keep him with me, so that he might minister to me on your behalf during my imprisonment for the gospel;