He was baptized, and all his household. Luke doth again commend the godly zeal of the keeper, that he did consecrate all his whole house to the Lord; wherein doth also appear the grace of God, in that he brought all his whole family unto a godly consent. And we must also note the notable exchange: he was of late about to murder himself, because he thought that Paul and the rest were escaped; but now laying aside all fear, he bringeth them home. [1] So that we see how faith doth animate and encourage those to behave themselves stoutly who before had no heart. And surely, when we droop [2] through fear and doubtfulness, there is no better matter of boldness than to be able to cast all our cares into God's bosom; that no danger may terrify us from doing our duty, whilst that we look for an end at God's hand, such as he shall see to be most profitable.

Footnotes

1 - "Sponte," of his own accord.

2 - "Torpeamus," become torpid.

And he took them - To a convenient place for washing. It is evident from this that, though the apostles had the gift of miracles, they did not exercise it in regard to their own sufferings or to heal their own wounds. They restored others to health, not themselves.
And washed their stripes - The wounds which had been inflicted by the severe scourging which they had received the night before. We have here a remarkable instance of the effect of religion in producing humanity and tenderness. This same man, a few hours before, had thrust them into the inner prison, and made them fast in the stocks. He evidently had then no concern about their stripes or their wounds. But no sooner was he converted than one of his first acts was an act of humanity. He saw them suffering; he pitied them, and hastened to minister to them and to heal their wounds. Until the time of Christianity there never had been a hospital or an almshouse. Nearly all the hospitals for the sick since have been reared by Christians. They who are most ready to minister to the sick and dying are Christians. They who are most willing to encounter the pestilential damps of dungeons to aid the prisoner are, like Howard, Christians. Who ever saw an infidel attending a dying bed if he could help it? and where has infidelity ever reared a hospital or an almshouse, or made provision for the widow and the fatherless? Often one of the most striking changes that occurs in conversion is seen in the disposition to be kind and humane to the suffering. Compare James 1:27.
And was baptized - This was done straightway; that is, immediately. As it is altogether improbable that either in his house or in the prison there would be water sufficient for immersing them, there is every reason to suppose that this was performed in some other mode. All the circumstances lead us to suppose that it was not by immersion. It was at the dead of night; in a prison; amidst much agitation; and was evidently performed in haste.

Washed their stripes - Ελουσεν απο των πληγων, He washed from the stripes: i.e. he washed the blood from the wounds; and this would not require putting them into a pool, or bath, as some have ridiculously imagined.

(18) And he took them the same hour of the night, and washed [their] stripes; and was baptized, he and all his, straightway.
(18) God with the very same hand wounds and heals when it pleases him.

And he took them the same hour of the night,.... After they had done preaching to him, and to his family:
and washed their stripes; which were very many and heavy, and whereby they were covered with blood; and which by this time began to fester, and to produce corrupt matter; and all this in a pool, which Grotius supposes was within the bounds of the prison, he washed off from them: his faith worked by love, and showed itself in fruits of charity and righteousness, and in obedience to Christ, and submission to his ordinance, as follows:
and was baptized, he and all his, straightway; by immersion, that being the only way in which baptism was administered, or can be, so as to be called a baptism: and which might be administered, either in the pool, which Grotius supposes to have been in the prison; or in the river near the city, where the oratory was, Acts 16:13 and it is no unreasonable thought to suppose, that they might go out of the prison thither, and administer the ordinance, and return to the prison again before morning unobserved by any; and after that, enter into the jailer's house and be refreshed, as in the following verse; and as this instance does not at all help the cause of sprinkling, so neither the baptism of infants; for as the jailer's family were baptized as well as he, so they had the word of the Lord spoken to them as well as he, and believed as well as he, and rejoiced as he did; all which cannot be said of infants; and besides, it must be proved that he had infants in his house, and that these were taken out of their beds in the middle of the night, and baptized by Paul, ere the instance can be thought to be of any service to infant baptism.

And he took them--the word implies change of place.
the same hour of the night, and washed their stripes--in the well or fountain which was within or near the precincts of the prison [HOWSON]. The mention of "the same hour of the night" seems to imply that they had to go forth into the open air, which, unseasonable as the hour was, they did. These bleeding wounds had never been thought of by the indifferent jailer. But now, when his whole heart was opened to his spiritual benefactors, he cannot rest until he has done all in his power for their bodily relief.
and was baptized, he and all his, straightway--probably at the same fountain, since it took place "straightway"; the one washing on his part being immediately succeeded by the other on theirs.

He washed their stripes - It should not be forgot, that the apostles had not the power of working miraculous cures when they pleased, either on themselves, or their dearest friends. Nor was it expedient they should, since it would have frustrated many wise designs of God, which were answered by their sufferings.