Ezra 4:7

And in the days of Arthasatha, wrote Bishlam, Mithredath, Tabeel, and the rest of his colleagues, to Arthasatha, king of Persia; and the writing of the letter' being written in Syriac, and being interpreted in Syriac.

2 Kings 18:26

And Eliakim son of Hilkiah, will say, and Shebna, and Joah, to Rabshakeh, Speak now to thy servants in Syriac; for we hear: and thou shalt not speak with us in Judaic in the ears of the people who are upon the wall

Daniel 2:4

And the Ohaldeans will speak to the king Syriac: O king, live forever: say to thy servants the dream, and we will show the interpretation.

Isaiah 36:11

And Eliakim will say, and Shebna, and Joah, to Rabshakeh, Speak now to thy servants Aramean, for we hear; and thou shalt not speak to us Judaic in the ears of the people who are upon the wall

Ezra 4:9

Then Rehum lord of judment, and Shimshai the scribe, and the rest of their colleagues, the Danites and the Apharsathchites, the Tarpelites, the Apharsites, the Archevites, the Babelites, the Susanchites, the Dehavites, the Elamites,

Ezra 4:17

And the king sent word to Rehum, lord of judgment, and to Shimshai the scribe, and the rest of their colleagues who dwelt in Shomeron, and the rest beyond the river, Peace and as now.

Ezra 5:6

The copy of the epistle that Tatnai, prefect beyond the river, sent, and Shethar-Bozni and his colleagues, the Apharsachites, that were beyond the river to Darius the king:

Treasury of Scripture Knowledge

Summary

And in the days of Artaxerxes wrote Bishlam, Mithredath, Tabeel, and the rest of their companions, unto Artaxerxes king of Persia; and the writing of the letter was written in the Syrian tongue, and interpreted in the Syrian tongue.

Bishlam

The syrian tongue

Bible References

Bishlam

Ezra 4:9
Then Rehum lord of judment, and Shimshai the scribe, and the rest of their colleagues, the Danites and the Apharsathchites, the Tarpelites, the Apharsites, the Archevites, the Babelites, the Susanchites, the Dehavites, the Elamites,
Ezra 5:6
The copy of the epistle that Tatnai, prefect beyond the river, sent, and Shethar-Bozni and his colleagues, the Apharsachites, that were beyond the river to Darius the king:

The syrian tongue

Isaiah 36:11
And Eliakim will say, and Shebna, and Joah, to Rabshakeh, Speak now to thy servants Aramean, for we hear; and thou shalt not speak to us Judaic in the ears of the people who are upon the wall
Daniel 2:4
And the Ohaldeans will speak to the king Syriac: O king, live forever: say to thy servants the dream, and we will show the interpretation.