John Gill Commentary 1 Chronicles 29:3

"Moreover also, because I have set my affection on the house of my God, seeing that I have a treasure of mine own of gold and silver, I give it unto the house of my God, over and above all that I have prepared for the holy house," — 1 Chronicles 29:3 (ASV)

Moreover, because I have set my affection to the house of my
God
Had a good will to it, and was earnestly desirous of having it built, and that in a grand manner:

I have of my own proper good ;
which he had treasured up for his own use:

of gold and silver, [even that] I have given to the house of my God ;
to build or ornament it, or make vessels for it:

over and above all that I have prepared for the holy house ;
for the building of the temple, which is made mention of in the preceding chapter.