'Thanksgiving' in the Bible

and Mattaniah the son of Mica, the son of Zabdi, the son of Asaph, who was the principal to begin the thanksgiving in prayer; and Bakbukiah, the second among his brethren; and Abda the son of Shammua, the son of Galal, the son of Jeduthun:

And the Levites: Jeshua, Binnui, Kadmiel, Sherebiah, Judah, Mattaniah, who was over the thanksgiving, he and his brethren;