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

(1) And have subdued them unto them, so that some of them they have for riding, some for food?

(سورة يس, Yaseen, Chapter #36, Verse #72)
(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 that which Allah gave as spoil unto His messenger from them, ye urged not any horse or riding-camel for the sake thereof, but Allah giveth His messenger lordship over whom He will. Allah is Able to do all things.

(سورة الحشر, Al-Hashr, Chapter #59, Verse #6)
(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)