Dear friends i am from Pakistan, belongs to ancient famous site of udyana now adays called malakand swat province khyber-pakhtunkhwa.
On a muslim grave head slab i found these signs. Can any one help us to explain what does it means?
View attachment 1901882
View attachment 1901883
If I might ask, what leads you to believe that is a Grave stone? Did you uncover human remains? (From your pic I can see the ground around it has been disturbed).
Since there doesn't appear to be any other markings, I don't believe it's a grave marker. I agree with Sod Buster, it looks instead to be a Kudurru or Boundary stone in my opinion.
In the Islamic faith, that mark is the Muslim symbol for the Goddess Ninhursag.
Ninhursag, also spelled Ninhursaga, was a very important Mother Goddess of Adab and Kish, in the northern herding regions of Mesopotamia. She was mainly known as the 'goddess of the stony, rocky ground, the hursag'. In particular, she had the power over the mountains and desert to produce wildlife.
https://en.wikipedia.org/wiki/Ninhursag
This appears to be a Boundary stone marking territory of the Goddess Ninhursag. Which seems odd as she was a goddess of the Mesopotamian region much farther to the West.
Then again, Udyāna itself (the region in which you say it was found) was primarily Buddhist.
An odd, interesting mix you have there. I don't believe it's treasure related though. But then again I'm no expert, that's just my opinion.
Have a Good'un.
