Translate, "What shall be the manner (or ordering) of the child, and what shall be his work (or exploits)." The original message of the Angel had given information on these two points:
(1) how the child was to be brought up, namely, as a Nazarite;
(2) what he should do, namely, begin to deliver Israel.
Manoah desires to have the information repeated (compare 1-Samuel 17:26-27, 1-Samuel 17:30). Accordingly, in Judges 13:13 the Angel refers to, and enlarges upon, his former injunctions.

And Manoah said, now let thy words come to pass,.... Which was not only a wish that they might, but a prayer of faith that they would come pass:
how shall we order the child? and how shall we do unto him? he believed a child would be born, and as he was to be a Nazarite, he knew what were the rules and orders to be observed concerning one in common; but as he was to be an extraordinary one, he was desirous of knowing what particular laws and rules were to be observed with respect to him, or what more was to be done to him than to another: the words may be rendered, as in the margin of our Bibles, "what shall be the judgment of the child, and his work?" and seems to relate not to what should be done to it, but what that should do; for being an extraordinary Nazarite, he supposed that some extraordinary work would be done by him, and he was curious to know it; and so Abarbinel interprets it of his request to know things future and wonderful, that should be done after the child was grown up; but this the angel chose not to inform him of, since it might have been prejudicial to them, should the Philistines get knowledge that this child would be a judge and saviour of Israel, and do such and such things to them as he did, they would have sought to have slain his wife while she bare him, or the child when born; and it may be observed, that though the angel told the woman at first, that he should "begin to deliver Israel out of the hand of the Philistines", Judges 13:5, yet she said nothing of it to her husband, nor did the angel repeat it.

Let thy words - Or, thy words shall come to pass: I firmly believe thy promises shall be fulfilled. How - What rules shall we observe about his education?