The Book of Psalms
CHAPTER 131. LORD, my heart is not proud, nor mine eyes haughty: neither do I exercise myself in great matters, or in things too difficult for me.
2 Surely I have stilled and quieted my soul, as a child that is quiet at his mother's breast: my soul is even as a weaned child within me.
3 O Israel, hope in the LORD from henceforth and for ever.