I Chronicles 16:41 Midrash

וְעִמָּהֶם֙ הֵימָ֣ן וִֽידוּת֔וּן וּשְׁאָר֙ הַבְּרוּרִ֔ים אֲשֶׁ֥ר נִקְּב֖וּ בְּשֵׁמ֑וֹת לְהֹדוֹת֙ לַֽיהוָ֔ה כִּ֥י לְעוֹלָ֖ם חַסְדּֽוֹ׃

and with them Heman and Jeduthun, and the rest that were chosen, who were mentioned by name, to give thanks to the LORD, because His mercy endureth for ever;