رُبَاعُ

[Four and four: four and four together: or four at a time and four at a time:] is a deviation from the original form, (S, K,) or أَرْبَعَةٌ أَرْبَعَةٌ; for which reason, [and, according to general opinion, because it is at the same time an epithet, (see ثُلَاثُ,)] it is imperfectly decl.: (K:) but the diminutive is ↓ رُبَيِّعٌ, perfectly decl. (S voce ثُلَاثُ, q. v.) [See exs. voce ثُلَاثُ.] In the Qur'an, 4:3, El-Aamash read ↓ وَرُبَعَ instead of وَرُبَاعَ. (IJ, K.)