- Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
- Perseus: Lane's Lexicon (in text format)
The root rEb (ر ع ب) occurs 5 times in Quran, in 1 derived forms:
Into the hearts of those who are bent on denying the truth We shall cast dread in return for their ascribing divinity, side by side with God, to other beings - [something] for which He has never bestowed any warrant from on high;* and their goal is the fire - and how evil that abode of evildoers!
Lo! Thy Sustainer inspired the angels [to convey this His message to the believers]: "I am with you !"* [And He commanded the angels:] "And, give firmness unto those who have attained to faith [with these words from Me]:* `I shall cast terror into the hearts of those who are bent on denying the truth; strike, then, their necks, [O believers,] and strike off every one of their finger-tips!"*
And thou wouldst have thought that they were awake, whereas they lay asleep. And We caused them to turn over repeatedly, now to the right, now to the left; and their dog [lay] on the threshold, its forepaws outstretched. Hadst thou come upon them [unprepared], thou wouldst surely have turned away from them in flight, and wouldst surely have been filled with awe of them.*
and He brought down from their strongholds those of the followers of earlier revelation who had aided the aggressors,* and cast terror into their hearts: some you slew, and some you made captive;
He it is who turned out of their homes, at the time of [their] first gathering [for war], such of the followers of earlier revelation as were bent on denying the truth.* You did not think [O believers] that they would depart [without resistance] - just as they thought that their strongholds would protect them against God: but God came upon them in a manner which they had not expected,* and cast terror into their hearts; [and thus] they destroyed their homes by their own hands as well as the hands of the believers.* Learn a lesson, then, O you who are endowed with insight!