Surah 43. Az-Zukhruf, Ayah 38

Thus do most of the commentators interpret the above phrase which, literally, reads "the two casts" (al-mashriqayn). This interpretation is based on the idiomatic usage, not infrequent in classical Arabic, of referring to two opposites - or two conceptually connected entities - by giving them the designation of one of them in the dual form: e.g., "the two moons", denoting "sun and moon"; "the two Basrahs", i.e., Kufah and Basrah; and so forth.

Lit.. "until".

If ever the presence of Allah is felt, or at the time of Judgment, a glimmering of truth comes to the deceived soul, and it cries to its evil companion in its agony, "Would that I had never come across thee! Would that we were separated poles apart!" But it cannot shake off evil. By deliberate choice it had put itself in its snare.

Distance of East and West: literally, 'distance of the two Easts'. Most Commentators understand in this sense, but some construe the phrase as meaning the distance of the extreme points of the rising of the sun, between the summer solstice and the winter solstice. Cf. n. 4034 to xxxvii. 5. A good equivalent idiom in English would be "poles apart", for they could never meet.