Charles Ellicott Commentary Ezra 7:8

"And he came to Jerusalem in the fifth month, which was in the seventh year of the king." — Ezra 7:8 (ASV)

In the seventh year. — The repeated notes of time must be marked. The journey itself comes afterwards: it is here indicated as having occupied four months. Ezra’s company also is summarised beforehand, according to the manner of this book.