Passage
and with them Heman and Jeduthun, and the rest who were chosen, who were mentioned by name, to give thanks to Yahweh, because his loving kindness endures forever;
and with them Heman and Jeduthun, and the rest who were chosen, who were mentioned by name, to give thanks to Yahweh, because his loving kindness endures forever;
1 Chronicles 16:39 and Zadok the priest, and his brothers the priests, before Yahweh’s tabernacle in the high place that was at Gibeon,
1 Chronicles 16:40 to offer burnt offerings to Yahweh on the altar of burnt offering continually morning and evening, even according to all that is written in Yahweh’s law, which he commanded to Israel;
1 Chronicles 16:41 and with them Heman and Jeduthun, and the rest who were chosen, who were mentioned by name, to give thanks to Yahweh, because his loving kindness endures forever;
1 Chronicles 16:42 and with them Heman and Jeduthun with trumpets and cymbals for those that should sound aloud, and with instruments for the songs of God; and the sons of Jeduthun to be at the gate.
1 Chronicles 16:43 All the people departed, each man to his house; and David returned to bless his house.
The verse centers on "heman", "jeduthun", "rest", "chosen", "mentioned", "name", "give", and "thanks". It is saying that the verse draws attention to "heman" and "jeduthun", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 40's "to offer burnt offerings to Yahweh on..." into verse 42's "and with them Heman and Jeduthun with...", so "heman" and "jeduthun" belong inside that flow. In 1 Chronicles context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "heman" and "jeduthun" with trust shaped by these words, not by a vague optimism outside the passage.