*Minor differences ignored. Grouped by changes, with first version listed as example.
To all that were in his house - Old and young. They instructed them in the doctrines of religion, and doubtless in the nature of the ordinances of the gospel, and then baptized the entire family.
And they spake unto him the word of the Lord - Thus, by teaching him and all that were in his house the doctrine of the Lord, they plainly pointed out to them the way of salvation. And it appears that he and his whole family, who were capable of receiving instructions, embraced this doctrine, and showed the sincerity of their faith by immediately receiving baptism. And, by the way, if he and all his were baptized straightway, παραχρημα, immediately, instantly, at that very time, dum ipsa res agitur, it is by no means likely that there was any immersion in the case; indeed, all the circumstances of the case, the dead of the night, the general agitation, the necessity of despatch, and the words of the text, all disprove it. The apostles, therefore, had another method of administering baptism besides immersion, which, if practised according to the Jewish formalities, must have required considerable time, and not a little publicity. As the Jews were accustomed to receive whole families of heathens, young and old, as proselytes, by baptism, so here the apostles received whole families, those of Lydia and the jailor, by the same rite. It is therefore pretty evident that we have in this chapter very presumptive proofs:
1. That baptism was administered without immersion, as in the case of the jailor and his family; and
2. That children were also received into the Church in this way; for we can scarcely suppose that the whole families of Lydia and the jailor had no children in them; and, if they had, it is not likely that they should be omitted; for the Jewish practice was invariably to receive the heathen children with their proselyted parents.
And they spake unto him the word of the Lord,.... That is, the Gospel; which comes from the Lord Jesus Christ, as the author of it; and is concerning him, as the subject matter of it, and is what was preached by himself when on earth; this is the word, which is called the word of salvation, the word of reconciliation and peace, the word of life, the word of righteousness, and the word of faith; because it publishes salvation by Christ, peace and reconciliation by his blood, life by his death, his righteousness for justification, and proposes him as the object of faith, and encourages souls to believe in him; and faith comes by it, and it contains things to be believed: and this word Paul and Silas spake to the jailer, and opened and explained it to him for his comfort, and for the encouragement of his faith in Christ:
and to all that were in his house; his whole family, who were all alarmed by the earthquake, and were got together into the prison; for it seems as if, after this, the jailer had them into his dwelling house, Acts 16:34. These appear to be adult persons, such as were capable of having the word of the Lord spoken to them, and of hearing it, so as to believe in it, and rejoice at it, for faith came to them by hearing.
And they spake unto him the word of the Lord--unfolding now, doubtless, more fully what "the Lord Jesus Christ" was to whom they had pointed his faith, and what the "salvation" was which this would bring him.
and to all that were in his house--who from their own dwelling (under the same roof no doubt with the prison) had crowded round the apostles, aroused first by the earthquake. (From their addressing the Gospel message "to all that were in the house" it is not necessary to infer that it contained no children, but merely that as it contained adults besides the jailer himself, so to all of these, as alone of course fit to be addressed, they preached the word).
*More commentary available at chapter level.