Back 
Surah 2. Al-Baqara
Ayah 67 - 71
67وَإِذْ قَالَ مُوسَىٰ لِقَوْمِهِۦٓ إِنَّ ٱللَّهَ يَأْمُرُكُمْ أَن تَذْبَحُوا۟ بَقَرَةً ۖ قَالُوٓا۟ أَتَتَّخِذُنَا هُزُوًا ۖ قَالَ أَعُوذُ بِٱللَّهِ أَنْ أَكُونَ مِنَ ٱلْجَـٰهِلِينَ
68قَالُوا۟ ٱدْعُ لَنَا رَبَّكَ يُبَيِّن لَّنَا مَا هِىَ ۚ قَالَ إِنَّهُۥ يَقُولُ إِنَّهَا بَقَرَةٌ لَّا فَارِضٌ وَلَا بِكْرٌ عَوَانٌۢ بَيْنَ ذَٰلِكَ ۖ فَٱفْعَلُوا۟ مَا تُؤْمَرُونَ
69قَالُوا۟ ٱدْعُ لَنَا رَبَّكَ يُبَيِّن لَّنَا مَا لَوْنُهَا ۚ قَالَ إِنَّهُۥ يَقُولُ إِنَّهَا بَقَرَةٌ صَفْرَآءُ فَاقِعٌ لَّوْنُهَا تَسُرُّ ٱلنَّـٰظِرِينَ
70قَالُوا۟ ٱدْعُ لَنَا رَبَّكَ يُبَيِّن لَّنَا مَا هِىَ إِنَّ ٱلْبَقَرَ تَشَـٰبَهَ عَلَيْنَا وَإِنَّآ إِن شَآءَ ٱللَّهُ لَمُهْتَدُونَ
71قَالَ إِنَّهُۥ يَقُولُ إِنَّهَا بَقَرَةٌ لَّا ذَلُولٌ تُثِيرُ ٱلْأَرْضَ وَلَا تَسْقِى ٱلْحَرْثَ مُسَلَّمَةٌ لَّا شِيَةَ فِيهَا ۚ قَالُوا۟ ٱلْـَٔـٰنَ جِئْتَ بِٱلْحَقِّ ۚ فَذَبَحُوهَا وَمَا كَادُوا۟ يَفْعَلُونَ
[67-71] Then call to mind the other event: when Moses said to his people, "Allah commands you to sacrifice a cow," they replied, "Do you mean to have a jest with us?" He answered, "I crave Allah's protection from behaving like ignorant people." Then they said, "Please make a request to your Lord to give us some details of the cow." Moses answered, "Allah says that the cow should neither be old nor immature but of middle age. Do, therefore, as you are bidden." But they further asked, "Please request your Lord to make it clear to us of what colour she should be." Moses answered, "He says that she should be of yellow colour, so deep and bright as to delight the beholders." Again they said, "Pray your Lord to specify for us the kind of cow that is required; for cows (of this type) look alike to us. We shall then find her, if God so wills." Moses answered, "Allah says that she should be a cow which has not been yoked nor has ploughed the land nor watered the fields; which is sound and whole, without belemish. " Then they cried out, "Now you have given an accurate description. " Then they sacrificed her but they did not appear to be doing this willingly.84
84The Israelites were commanded to sacrifice a cow in order to rid them of the sanctity and worship of cow which they had adopted from the pagan nations around them. It was a test of their faith: if they really believed in Allah as their only Deity and did not make anyone or anything else the object of their worship, they should break the idol of their former worship with their own hands. But this proved to be a very hard test. They tried to evade and avoid the sacrifice because their belief in One God had not become firm as yet. They went on asking one detail after the other in order to put it off, but the more questions they asked the more they were driven into a tight corner. So much so that at last they were specifically told to sacrifice that very golden-coloured cow, which was being specially chosen for worship at that time. The Bible also mentions this incident, but does not tell how the Israelites tried to put it off by asking a number of unnecessary questions. (Please refer to Numbers, 19: 1-10).