Jeremiah 29:12

“Then shall ye call upon me, etc.] When the expected end is about to be given; when God intends and is about to bestow a mercy, he gives his people a spirit of prayer to ask for it; and even the promise of it is a considerable argument to encourage and engage more to pray for it: and ye shall go and pray unto me: walk in my ways; so Jarchi, Kimchi, and Ben Melech; or rather ye shall go into your private closets, or into those public places where prayer was wont to be made, and there put up your petitions; or it may be the meaning is, that they should continue praying unto him; should pray without ceasing, until they enjoyed the blessing, and had the expected end given them: and I will hearken…”

“Fulfilled (Dan 9:3, &c.). 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.”

“29:12-13 Through Jeremiah, the Lord reminded the exiled people that if they would look for him wholeheartedly, they would find him. The Exile taught the Israelites to reject false gods and give their wholehearted devotion to the Lord (Deut 6:4-6). It also gave them a new commitment to the revealed word of God.”

“Jer 31:9, Jer 33:3; Neh. 2:4-20; Psa 10:17, Psa 50:15, Psa 102:16, Psa 102:17; Isa 30:19, Isa 65:24; Eze 36:37; Dan. 9:3-19; Zac 13:9; Mat 7:7, Mat 7:8 Jeremiah 29:13”