Zechariah 8:2

Thus saith the Lord of hosts "At each word and sentence, in which good things, for their greatness almost incredible, are promised, the prophet premises, Thus saith the Lord of hosts, as if he would say, Think not that what I pledge you are my own, and refuse me not credence as man. What I unfold are the promises of God." Jerome, quoted by Pusey.

I was Rather, I am. Comp. Zechariah 1:14 , where the same tense is so rendered.

with great fury i.e. against her enemies, as Zechariah 1:15.