A well-slept child grows well—used to say that adequate sleep is important for a child's growth.
赤ちゃんはよく寝る。寝る子は育つと言うように、心配いらないよ。
The baby sleeps a lot. As they say, a well-slept child grows well—you don't need to worry.
最近よく食べてよく寝るから、寝る子は育つというのは本当だね。
Lately they eat well and sleep well—it's true what they say, a well-slept child grows well.
夜更かしばかりしていると成長に悪い。寝る子は育つを忘れないで。
Staying up late all the time is bad for growth. Remember that a well-slept child grows well.