For fear — So they made the more haste, lest they should be hindered. Apprehension of dangers should quicken us in our duty. Have we many enemies? We have the more need to have God for our friend and to keep up our correspondence with him.
Related Commentaries of Ezra 3:3
Ezra 3:3
3 And they set the altar upon his bases; for fear was upon them because of the people of those countries: and they offered burnt offerings thereon unto the LORD, even burnt offerings morning and evening.