6-Surah Al-An’am ( The Cattle ) 143
[They are] eight mates – of the sheep, two and of the goats, two. Say, ‘ Is it the two males He has forbidden or the two females or that which the wombs of the two females contain? Inform me with knowledge, if you should be truthful.’
ثَمَانِيَةَ أَزْوَاجٍ ۖ مِّنَ الضَّأْنِ اثْنَيْنِ وَمِنَ الْمَعْزِ اثْنَيْنِ ۗ قُلْ آلذَّكَرَيْنِ حَرَّمَ أَمِ الْأُنثَيَيْنِ أَمَّا اشْتَمَلَتْ عَلَيْهِ أَرْحَامُ الْأُنثَيَيْنِ ۖ نَبِّئُونِي بِعِلْمٍ إِن كُنتُمْ صَادِقِينَ
Quran's Tafhim ( explanation)
*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.