Al-Baqarah - 2:68

قَالُواْ ادْعُ لَنَا رَبَّكَ يُبَيِّن لّنَا مَا هِيَ قَالَ إِنَّهُ يَقُولُ إِنَّهَا بَقَرَةٌ لاَّ فَارِضٌ وَلاَ بِكْرٌ عَوَانٌ بَيْنَ ذَلِكَ فَافْعَلُواْ مَا تُؤْمَرونَ
[2:68]
They said: Call on your Lord for our sake to make it plain to us what she is. Musa said: He says, Surely she is a cow neither advanced in age nor too young, of middle age between that (and this); do therefore what you are commanded.
They said: "Beseech on our behalf Thy Lord to make plain to us what (heifer) it is!" He said; "He says: The heifer should be neither too old nor too young, but of middling age. Now do what ye are commanded!"
They said: Pray for us unto thy Lord that He make clear to us what (cow) she is. (Moses) answered: Lo! He saith, Verily she is a cow neither with calf nor immature; (she is) between the two conditions; so do that which ye are commanded.