The Aramaic word iggera refers to an official letter or written communication. Borrowed from Akkadian egirtu, it appears in the book of Ezra where letters are exchanged between Persian officials and the king regarding the rebuilding of Jerusalem.
The use of iggera in Ezra highlights the providential sovereignty of God who works even through secular correspondence and imperial bureaucracy to accomplish His redemptive purposes. Letters and decrees from pagan kings become instruments of divine will, reminding us that God rules over all earthly authority (Proverbs 21:1).