Sunnahs of the Prophet are fixed
Praying until a sutrah
On the authority of Musabin, Talha, on the authority of his father, said:
The Messenger of God, may God bless him and grant him peace, said
If one of you places in his hands something like an asshole, he leaves.
Let him pray and do not care who passes after that.
The sutrah is what the praying person puts in front of him when praying
Such as a wall, column, etc
And the back of the nomads
Approximately two-thirds of a cubit high