Komentarz do Diwrej ha-jamim I 22:6

And David said, etc. from now on, anyone seeking the Lord to offer a sacrifice to Him shall go forth and sacrifice on that altar.

to gather the strangers who had converted, because he did not wish to make Israelites perform rigorous labor. And so we find with Solomon below (II Chron. 2:1): “And Solomon counted, etc.”; (ibid. verse 17): “And he made of them seventy thousand who bear burdens.” And it is written further (ibid. 8:7): “And all the people remaining from the Hittites, etc., who were not of Israel, etc.”; (ibid. verse 9): “And of the Children of Israel, whom Solomon did not make slaves, etc.”

for the nails, for the doors of the gates in German, negel, nails.