Here,
1. We have the effectual fervent prayer of a righteous man prevailing: he never gave over till he got it.
2. The Lord allows and loves importunity in prayer.
3. He and the people of God were under a sore trial, for the seventy years captivity were expired. Therefore he saith, Defer not now, Lord, it is high time for thee to have mercy upon Zion, yea, the set time is come: Lord, hear for thine own sake, though not for ours. What! hast thou forgotten? O Lord, remember.