The Sutrah (partition in front of one who is praying)

The Sutrah

Something which the person praying places in front of himself to serve as a partition between him and any person who may walk in front of him

https://www.al-feqh.com/en/the-sutrah-partition-in-front-of-one-who-is-praying

Making use of the partition is prescribed at home, on a journey, during obligatory prayer and supererogatory prayer, in the mosque and anywhere else; for what has been confirmed from the Prophet ? that he said: “Whenever any of you is praying, let him pray toward a partition and let him move close to it.” [ Source: Abu Dawud.]