PArm

*ŝhd - to witness (Kogan 2015:396)

The only cognate of PArm. *ŝhd ‘to witness’ is Arb. šhd with the same meaning (Lane 1609).

Hebrew
ŝāhēd - witness (HALOT 1311)
Hbr. ŝāhēd in Job 16:19 is an obvious Aramaism (Wagner 1966:109).
Old Aramaic
šhd - to give testimony (DNWSI 1112)
Biblical Aramaic
sāhădūtā - witness, testiminy (HALOT 1985)
Jewish Palestinian Aramaic
shd - to testify, admonish (DJPA 570)
Syriac
shd - to testify (LSyr. 461, SL 973)