The word(s) "foundations" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Pickthal translation.

(1) And when Abraham and Ishmael were raising the foundations of the House, (Abraham prayed): Our Lord! Accept from us (this duty). Lo! Thou, only Thou, art the Hearer, the Knower.

(سورة البقرة, Al-Baqara, Chapter #2, Verse #127)
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(2) Those before them plotted, so Allah struck at the foundations of their building, and then the roof fell down upon them from above them, and the doom came on them whence they knew not;

(سورة النحل, An-Nahl, Chapter #16, Verse #26)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)