John Gills Exposition of the Bible Commentary

Verse 18 (1 Chronicles 29:18)

O Lord God of Abraham, Isaac, and of Israel, our fathers , The ancestors of the Jewish nation, whose covenant God the Lord was, and who had ever been mindful of his promise to them, with respect to them their seed:

keep this for ever in the imagination of the thoughts of the heart of thy people ; let the same disposition of mind always continue in them to serve the Lord their God:

and prepare their heart unto thee ; incline and dispose their minds always to fear the Lord, and obey his will.

- John Gills Exposition of the Bible Commentary