New Revised Standard Version
Then Paul took the men, and the next day, having purified himself, he entered the temple with them, making public the completion of the days of purification when the sacrifice would be made for each of them.

Contemporary English Version
The next day Paul took the four men with him and got himself ready at the same time they did. Then he went into the temple and told when the final ceremony would take place and when an offering would be made for each of them.

New American Bible
So Paul took the men, and on the next day after purifying himself together with them entered the temple to give notice of the day when the purification would be completed and the offering made for each of them.

Douay-Rheims Bible
Then Paul took the men and, the next day being purified with them, entered into the temple, giving notice of the accomplishment of the days of purification, until an oblation should be offered for every one of them.

Then Paul took the men and, the next day being purified with them, entered into the temple, giving notice of the accomplishment of the days of purification, until an oblation should be offered for every one of them.

Then.

1 Corinthians 9:20 And I became to the Jews a Jew, that I might gain the Jews:

entered.

Acts 24:18 In which I was found purified in the temple: neither with multitude nor with tumult.

to signify.

Numbers 6:13-20 This is the law of consecration. When the days which he had determined by vow shall be expired, he shall bring him to the door of the tabernacle of the covenant, . . .