The word(s) "pesado" appears 3 time(s) in 3 verse(s) in Quran in Portuguese (Prof. Samir El-Hayek) translation.

(1) Responderam: Não quebramos a promessa que te fizemos por nossa vontade, mas fomos obrigados a carregar osornamentos pesados do povo, e os lançamos ao fogo, tal qual o samaritano sugeriu.

(سورة طه, Taa-Haa, Chapter #20, Verse #87)
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(2) Aqueles que desdenharem isto, carregarão um pesado fardo no Dia da Ressurreição,

(سورة طه, Taa-Haa, Chapter #20, Verse #100)
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(3) Em verdade, (quanto aos outros) preferem a efêmera vida terrena e tentam afastar a lembrança de um dia (que será) pesado.

(سورة الانسان, Al-Insaan, Chapter #76, Verse #27)
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