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 4:7
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.
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.
2 Kings 18:26-27
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