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

(1) I will turn away from My communications those who are unjustly proud in the earth; and if they see every sign they will not believe in It; and if they see the way of rectitude they do not take It for a way, and if they see the way of error. they take it for a way; this is because they rejected Our communications and were heedless of them.

(سورة الأعراف, Al-A'raaf, Chapter #7, Verse #146)
(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)

(2) And certainly We gave to Ibrahim his rectitude before, and We knew him fully well.

(سورة الأنبياء, Al-Anbiyaa, Chapter #21, Verse #51)
(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)