Pass in front of someone is praying

Asak Shaikh. If a person is praying you are not supposed to pass in front of him. However if that person has completed his prayers and is now making Dua that that rule still apply or you can pass in front of him.

wa'alaykumsalaam wa rahmatullahi wa barakaatouh.

Once the prayer is over, the ruling of passing infront of anyone is over.

Allah knows best.