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Then their dissension (read accusative fitnatahum or nominative fitnatuhum) their apology, was (read lam takun or lam yakun) only to say, in other words, [was only] their saying, 'By Allahu ta’ālā, our Rabb (read rabbinā as an adjective of [wa'Llāhi, 'by Allahu ta’ālā'], or rabbanā as a vocative) we were never idolaters'.