'Enlist' in the Bible

There was intense fighting against the Philistines during Saul's entire reign, and whenever Saul discovered a strong or valiant warrior, he would enlist him for service.

to be subject to such leaders [treating them with courtesy and respect], and to everyone who helps in the work and labors [for the benefit of yourselves and the church].

no one serving as a soldier did entangle himself with the affairs of life, that him who did enlist him he may please;