Ibn Majah

Explanation:
1:
‘Aqiqah refers to the animal sacrifice that is performed on behalf of a newborn.
It is also said that originally ‘aqiqah refers to the hair that grows on the head of the newborn while in the mother’s womb.
In this context, the animal that is sacrificed on behalf of the newborn is called ‘aqiqah.
Another opinion is that ‘aqiqah is derived from “‘aqq,” which means to tear and to cut.
The goat that is slaughtered is called ‘aqiqah because its limbs are cut into pieces and its belly is torn open.
From this hadith, it is understood that two goats should be sacrificed for a boy and one goat for a girl.
From the word “shaah” (goat/sheep), it is inferred that the conditions required for the sacrificial animal (udhiyah/qurbani) do not apply to the animal for ‘aqiqah.
However, it is better to observe the same precautions regarding defects and faults in the animal for ‘aqiqah as the Lawgiver (Shari‘) has instructed for the sacrificial animal.
There is no hadith that establishes the requirement for the ‘aqiqah animal to have two permanent teeth (thaniyyah).
However, the word “shaah” implies that it should be of mature age.
And the word “shaah” also implies that cows and camels are not permissible for ‘aqiqah.
If cows and camels were permissible for ‘aqiqah, the Prophet sallallahu alayhi wa sallam would not have mentioned only “shaah.”