ثَمَانِيَةَ أَزْوَاجٍ ۖ مِّنَ الضَّأْنِ اثْنَيْنِ وَمِنَ الْمَعْزِ اثْنَيْنِ ۗ قُلْ آلذَّكَرَيْنِ حَرَّمَ أَمِ الْأُنثَيَيْنِ أَمَّا اشْتَمَلَتْ عَلَيْهِ أَرْحَامُ الْأُنثَيَيْنِ ۖ نَبِّئُونِي بِعِلْمٍ إِن كُنتُمْ صَادِقِينَ (143)
(6:143) These are eight couples, two of sheep, two of goats. Now ask them: 'Is it either the two males that Allah has forbidden or the two females, or what the wombs of the two females may contain? Tell me about this on the basis of sure knowledge, if you speak the truth.' *119
*119). That is, they should come forward with arguments based on sound, reliable knowledge, rather than with arguments which have no authority except that of ancestral tradition, conjecture or superstition.