וַיֹּ֣אמֶר דָּוִ֔יד לִכְנוֹס֙ אֶת־הַגֵּרִ֔ים אֲשֶׁ֖ר בְּאֶ֣רֶץ יִשְׂרָאֵ֑ל וַיַּעֲמֵ֣ד חֹֽצְבִ֗ים לַחְצוֹב֙ אַבְנֵ֣י גָזִ֔ית לִבְנ֖וֹת בֵּ֥ית הָאֱלֹהִֽים׃
Und David befahl, die Fremden zu versammeln, die im Land Israel waren; und er ließ Maurer Schmiedesteine hauen, um das Haus Gottes zu bauen.
Rashi
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.”