33:15 although ere that they had vowed before God that they would never turn their backs [on His message]: and a vow made to God must surely be answered for!
Muhammad Asad (The Message Of Quran)
Dictionaries
Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
And how many a prophet has had to fight [in God's cause], followed by many God-devoted men: and they did not become faint of heart for all that they had to suffer in God's cause, and neither did they weaken, nor did they abase themselves [before the enemy], since God loves those who are patient in adversity;