דברי הימים א כט:יט פירוש: רש״י

And to Solomon, my son, give a perfect heart to prepare his heart to be perfect with his God, to keep His commandments, etc., and so did Solomon request (I Kings 8:57-61): “May the Lord our God be with us... Let your heart, [therefore] be perfect.”

and to build the palace that I have prepared aprestai in Old French, I have prepared. And now, because I have prepared and made everything ready, it is easy for Solomon to build, provided that Your Hand helps him.