Al-Baqarah 2:68

Qaloo odAAu lana rabbakayubayyin lana ma hiya qala innahu yaqooluinnaha baqaratun la faridun walabikrun AAawanun bayna thalika fafAAaloo matu/maroon

They said, "Call upon your Lord to make clear to us what it is." [Moses] said, "[Allāh] says, 'It is a cow which is neither old nor virgin, but median between that,' so do what you are commanded."

They said, “Pray for us to your Lord that He makes it clear to us what sort (of cow) should she be.” He said, “He says she should be a cow neither too old, nor too young - of some middle age in between. Now, do what you are being asked to do.”