Then shall ye call upon me, and ye shall go and pray unto me, and I will hearken unto you.
Ye shall go and pray unto me, and I will hearken unto you - fulfilled Daniel 9:3, etc. When God designs mercy, He puts it into the hearts of His people to pray for the mercy designed. When such a spirit of prayer is poured out, it is a sure sign of coming mercy.
Go - to the temple and other places of prayer; contrasted with their previous sloth as to going to seek God.