1 Corinthians 9:7
Who ever goes a warfare at his own charges? who planteth a vineyard, and doth not eat of the fruit of it? or who feedeth a flock, and doth not eat of the milk of the flock?
2 Corinthians 10:4
(for the weapons of our warfare are not carnal, but mighty through God to the demolishing of bulwarks:)
1 Timothy 1:18
This charge I commit to thee, son Timothy, according to the prophecies which before came on thee, that by them thou mightest war a good warfare,
1 Timothy 6:12
Maintain the glorious combat of faith, lay hold on eternal life, to which thou hast been called, and hast made a good profession before many witnesses.
2 Timothy 2:3-5
Do thou therefore endure hardship, as becomes a good soldier of Jesus Christ.