Hebrews 12:5-7 New Revised Standard Version (NRSV)
5 And you have forgotten the exhortation that addresses you as children—
“My child, do not regard lightly the discipline of the Lord,
7 Endure trials for the sake of discipline. God is treating you as children; for what child is there whom a parent does not discipline?
Hebrews 12:11-13 New Revised Standard Version (NRSV)
11 Now, discipline always seems painful rather than pleasant at the time, but later it yields the peaceful fruit of righteousness to those who have been trained by it.
12 Therefore lift your drooping hands and strengthen your weak knees, 13 and make straight paths for your feet, so that what is lame may not be put out of joint, but rather be healed.