The amazing thing about the Greek language is how verb tenses can tell you more than the English language. In this verse all 3 verbs, washed, sanctified, and justified all are in the aorist tense indicating a completed action in their past. What is this action? Acts 22:16 has the exact same verb tense used. The aorist tense is used with be baptized, wash away your sins, calling on the name of The Lord, which all according to Greek grammar have to occur at the same completed action in the past. This seems to be pointing in both passages to their baptisms which is how one calls on the name of The Lord. This corresponds also to Acts 2:21,37-38.