What is the distance between the hands of the one praying and the sutrah?

Question:
What is the distance that one who wants to pass in front of a person who is praying must leave, so that he is thereby outside the range of passing in front of the one praying?

Answer:
The one praying is in one of two states:
One is that he has placed a sutrah, in which case no one is allowed to pass between him and the sutrah.
The second is that he has not placed a sutrah. The best that has been said regarding this is that it is estimated at three cubits from his foot. If it is more than three cubits, passing does not harm. They cited as evidence for this that the Prophet (peace and blessings be upon him), when he prayed in the Ka'bah, placed three cubits between himself and the wall, three cubits between his foot and the wall. They said: This indicates that the sutrah is to be at this distance.
This is all regarding the one who prays alone. As for the one who prays behind the imam, nothing breaks his prayer, for the imam is a sutrah for him. So the ma'mum does not need a sutrah. Even if a woman, a donkey, a dog, or something else passed in front of him, it would not break his prayer.