Verses with the word shabbethai in the Old Testament (3 verses):

Ezra 10:15
Only Jonathan the son of Asahel and Jahaziah the son of Tikvah were employed about this matter: and Meshullam and Shabbethai the Levite helped them.

Nehemiah 8:7
Also Jeshua, and Bani, and Sherebiah, Jamin, Akkub, Shabbethai, Hodijah, Maaseiah, Kelita, Azariah, Jozabad, Hanan, Pelaiah, and the Levites, caused the people to understand the law: and the people stood in their place.

Nehemiah 11:16
And Shabbethai and Jozabad, of the chief of the Levites, had the oversight of the outward business of the house of God.