For though Saul was king in Samuel's last days, yet Samuel did not then quite cease to be a judge, being so made by God's extraordinary call, which Saul could not destroy; and therefore Samuel did sometimes, upon great occasions, though not ordinarily, exercise the office of a judge after the beginning of Saul's reign; as 1 Samuel 11:7, 1 Samuel 15:32,33. And the years of the rule of Saul and Samuel are joined together, Acts 13:20,21. Quest. How doth the office of a judge agree with Hannah's vow, whereby she devoted him to a perpetual attendance upon the Lord's service? Answ. This was not inconsistent with her vow, which consisted of two branches; the one more general, that he should be given or lent to the Lord all his days, 1 Samuel 1:11,28, which she faithfully executed, leaving him wholly to the service and disposal of the Lord, who thought fit to employ him in this way; and if any thing therein was contrary to that vow, could undoubtedly dispense with it, as being his own right only: the other more particular, that no razor should come upon his head; nor doth it appear that this part was violated; or if it was, it was done by Divine dispensation.
Related Commentaries of 1 Samuel 7:15
1 Samuel 7:15
15 And Samuel judged Israel all the days of his life.