וּבָ֨תִּ֜ים מְלֵאִ֣ים כָּל־טוּב֮ אֲשֶׁ֣ר לֹא־מִלֵּאתָ֒ וּבֹרֹ֤ת חֲצוּבִים֙ אֲשֶׁ֣ר לֹא־חָצַ֔בְתָּ כְּרָמִ֥ים וְזֵיתִ֖ים אֲשֶׁ֣ר לֹא־נָטָ֑עְתָּ וְאָכַלְתָּ֖ וְשָׂבָֽעְתָּ׃
and houses full of all good things, which thou didst not fill, and cisterns hewn out, which thou the didst not hew, vineyards and olive-trees, which thou didst not plant, and thou shalt eat and be satisfied—
Rashi on Deuteronomy
חצובים [CISTERNS] HEWN OUT — Because it (Palestine) was a country of stony ground and rocks, the term "hewn" is applicable here.