Ruling on children under the age of seven standing in the prayer row

Question:
As for children who have not reached the age of discernment, it is valid for them to stand in the first row behind the imam. Is his age five years old, six years old?

Answer:
What appears is that they are not placed with the rows; because they are not among those who are obligated to pray. Rather, those who are obligated to pray are seven years old and above, as in the hadith: .
As for those under seven, they are not among those who are obligated to pray. They may disturb the worshippers, they may harm the worshippers, so it is not befitting for them to be with the worshippers. It is befitting for them to remain in the house.

Question: We sometimes place the boys between the men, some of them, so that they do not mix with each other and play during the prayer?

Answer: This is a remedy. If their mischief is feared, a man should be placed between them; a man between every two of them; so that they do not misbehave.