The hadith of Muslim bin Shu'bah from Sa'r bin Daysam, from the two envoys of the Messenger of Allah (peace and blessings be upon him), has already passed, in which the two of them said about the sheep that was given to them: "This is a shafi', and the Messenger of Allah (peace and blessings be upon him) has forbidden us to take a shafi'." A shafi' is a female carrying her young in her belly. Sa'r said: So I asked: "Then what will you two take?" They said: "An 'anaq jadha'ah (a one-year-old female kid) or a thaniyyah (a two-year-old goat)." Sa'r said: So I brought out an 'anaq (female kid) to them. They said: "Lift it up to us." So they took hold of it and loaded it onto their camel.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / Q7300