'Purpose' in the Bible

Now when our enemies heard that we knew about their plot against us, and that God had frustrated their plan, we all returned to the wall, each one to his work.

Ezra the scribe stood on a [large] wooden platform which they had constructed for this purpose. And beside him [on the platform] stood Mattithiah, Shema, Anaiah, Uriah, Hilkiah, and Maaseiah on his right; and Pedaiah, Mishael, Malchijah, Hashum, Hashbaddanah, Zechariah, and Meshullam on his left.