acts 16:34 And when he had brought them into his house, he set meat before them, and rejoiced, believing in God with all his house. - Free Bible Online

      34. And when he had brought them into his house, he set meat before them and rejoiced, believing--that is, as the expression implies, "rejoiced because he had believed."
      in God--as a converted heathen, for the faith of a Jew would not be so expressed [ALFORD].
      with all his house--the wondrous change on himself and the whole house filling his soul with joy. "This is the second house which, in the Roman city of Philippi, has been consecrated by faith in Jesus, and of which the inmates, by hospitable entertainment of the Gospel witnesses, have been sanctified to a new beginning of domestic life, pleasing and acceptable to God. The first result came to pass in consequence simply of the preaching of the Gospel; the second was the fruit of a testimony sealed and ennobled by suffering" [BAUMGARTEN].

JFB.