One from "The Tur Abdin Timeline": http://turabdin.info/
The oldest inscription in the Syriac language found so far in the Syriac Orthodox heartland of Tur Abdin is a Christian one:
In 451, the Council of Chalcedon resulted in a Church split. Those who rejected it (non-Chalcedonians) were then persecuted by the Chalcedonian Byzantine Emperors. This is the likely background of the oldest Syriac inscription found so far in Tur Abdin, from 534:
"On the 4th day [of (month) of the ye]ar 845*, in the days of M[or Seve]r[us, the a]bbot [...] the priest [Is]aiah, [...] and Mor Maron [...] and [...], priest and visitor, escaped [and took refug]e [in] our m[onastery from the party of the evildoers]"
It likely tells of clergy escaping Chalcedonian persecution and taking refuge at Mor Gabriel Monastery. Since then it has been broken in two and disfigured by a gunshot. It was surrounded with rocks and covered with branches by Kurds, who called it 'the stone of help'** and brought their sickly children to it.
*Year of the Greeks, 534 A.D.
**For the unlettered an inscription from ancient times is an object of awe; it is often believed to contain the power of healing, or else that it has an evil power set on it, perhaps to guard some treasure which it hides.
You can see the Syriac text if you look closely, around those holes in the photo (the part that is "higher" than the rest):