1 Chronicles 16:9

Sing unto him, sing psalms unto him, talk ye of all his wondrous works.

The verse belongs to the psalm David gave to be sung when the ark of God was brought to Jerusalem, an inspiring psalm calling for singing to God and speaking of all His wondrous works.
It stands in 1 Chronicles 16:8-22, which repeats the opening of Psalm 105, found as Psalm 105:1-6 and as its first fifteen verses with slight variations, and is followed by the whole of Psalm 96 in verses 23-33, showing that this portion of Chronicles is a psalm belonging to the book of Psalms as a collection of prayer and praise written in a form to be sung.
As poetry rather than prose, its language must not be construed literally with severe prose force or swelled to poetic fervor.

It calls for singing to God in psalms and talking of all His wondrous works, which was Israel's duty to declare Jehovah's glory among the nations so that the Gentiles might be converted.
It is a call to those who have present salvation as born-again children of God who have passed from death unto life and had the soul delivered from death to rejoice in assurance and to draw daily living water out of the wells of salvation.
They are to give thanks unto the Lord and call upon His name, to have a new song in the mouth and sing to Him and speak of His wonderful works, and to make His deeds known among the people so the lost hear and are led to accept salvation.
They are to glory in His holy name with rejoicing hearts that seek the Lord, to sing to the Lord through all the earth and show forth His salvation from day to day, and in the same breath to pray for the feet to be kept from falling.

The chapter's connection with the promise extending to a thousand generations does not prove that the end of the world is far in the future, because the promised inheritance is for those who belong to Christ, not for the Jews by physical descent alone.