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

(1) And enjoin prayer on your followers, and steadily adhere to it; We do not ask you for subsistence; We do give you subsistence, and the (good) end is for guarding (against evil).

(سورة طه, Taa-Haa, Chapter #20, Verse #132)
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(2) And the chief persons of them break forth, saying: Go and steadily adhere to your gods; this is most surely a thing sought after.

(سورة ص, Saad, Chapter #38, 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)