Why would the sheep and shepherd in Jeremiah 50:6 move from a mountain to a hill. Doesn't seem like the normal progression of matters does it, now? Once you've been on the mountaintop, you would prefer the expanse to the hills. Acts 2:26 promises a rest in hope.
The passage in Jeremiah reminds me of the parable of the Lost Sheep. Jesus is the Good Shepherd, who will not lead us to poor pastures. Psalm 23:2 The parable shepherd had a hundred sheep, but one wandered off. So he left the ninety-nine and went in search of the lost lamb. That is such a refreshing fact about the loving nature of God's heart. He will not only provide a resting place for you, but when you have lost your way, he will come find you. God heard your prayers before you ever asked. Daniel 10:12 God hears and God answers. He has a plan for each of us. This incident with Daniel was not a token favor of God for His favorite Lamb, though He was partial to Daniel. Ezekiel 14:14 He would do that for any particular sheep who called for Him. Matthew 11:28, 29, 30