﴿ قَالَ إِنَّهُۥ يَقُولُ إِنَّهَا بَقَرَةٌۭ لَّا ذَلُولٌۭ تُثِيرُ ٱلْأَرْضَ وَلَا تَسْقِى ٱلْحَرْثَ مُسَلَّمَةٌۭ لَّا شِيَةَ فِيهَا ۚ قَالُوا۟ ٱلْـَٰٔنَ جِئْتَ بِٱلْحَقِّ ۚ فَذَبَحُوهَا وَمَا كَادُوا۟ يَفْعَلُونَ ﴾

“[Moses] answered: "Behold, He says it is to be a cow not broken-in to plough the earth or to water the crops, free of fault, without markings of any other colour."Said they: "At last thou hast brought out the truth!"-and thereupon they sacrificed her, although they had almost left it undone.”

�and without blemish� When asked about this verse Sahl said:This means that there should be no mark on it which blemishes it, nor a patch of colour which differs from the colour of the rest of its body. In this there is wisdom from its Maker and a lesson for the one who takes heed by it, and grows in certainty because of his faith and his profession of God�s oneness.