The word(s) "slaughtered" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) Surely Firon exalted himself in the land and made its people into parties, weakening one party from among them; he slaughtered their sons and let their women live; surely he was one of the mischiefmakers.

(سورة القصص, Al-Qasas, Chapter #28, Verse #4)
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(2) But they called him a liar and slaughtered her, therefore their Lord crushed them for their sin and levelled them (with the ground).

(سورة الشمس, Ash-Shams, Chapter #91, Verse #14)
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