Isaiah 55:11 ESV

https://bible.com/bible/59/isa.55.11.ESV

Again, this is not a verse I encountered in my daily Bible reading but it is one I am very familiar with because it is the theme verse of the Gideons and it encourages us that there is always merit in sharing God's word because we can be confident that God will use his word to accomplish his purposes:

so shall my word be that goes out from my mouth; it shall not return to me empty, but it shall accomplish that which I purpose, and shall succeed in the thing for which I sent it.

Isaiah 55:11 ESV

https://bible.com/bible/59/isa.55.11.ESV