The word(s) "convincing" appears 3 time(s) in 3 verse(s) in Quran in Mohsin Khan translation.

(1) O mankind! Verily, there has come to you a convincing proof (Prophet Muhammad صلى الله عليه وسلم) from your Lord; and We sent down to you a manifest light (this Qur'an).

(سورة النساء, An-Nisaa, Chapter #4, Verse #174)
(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) [Musa (Moses)] said: "Even if I bring you something manifest (and convincing)?"

(سورة الشعراء, Ash-Shu'araa, Chapter #26, Verse #30)
(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)

(3) And when it was said: "Verily, Allah's Promise is the truth, and there is no doubt about the coming of the Hour," you said: "We know not what is the Hour: we do not think it but as a conjecture, and we have no firm convincing belief (therein)."

(سورة الجاثية, Al-Jaathiya, Chapter #45, Verse #32)
(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)