- Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
- Perseus: Lane's Lexicon (in text format)
- klA (if it is not found in the link above)
The root klA (ك ل ا) occurs 1 times in Quran, in 1 derived forms:
Say: Who could protect you, by night or by day, from the Most Gracious?"* And yet, from a remembrance of their Sustainer do they stubbornly turn away!