He bought an animal for sacrifice and it gave birth

I bought a sheep (ewe) to offer as a sacrifice and it gave birth shortly before it was due to be slaughtered. What should I do with its offspring?.

Praise be to Allah, and blessings and peace be upon the Messenger of Allah:

The udhiyah is that which is bought specifically for the purpose of sacrifice or is singled out for that purpose, so it gives birth before the time of slaughter, then slaughter the offspring along with it.

And Allah is the Source of strength.