Psalm 37:25

I have been young, and now am old; yet I have not seen the righteous forsaken, nor his descendants begging bread.

The righteous are walking according to God’s word.  They keep God’s commandments and therefore maintain a relationship with God no matter the circumstances.  They pass down their knowledge to their children and teach them how to walk according to the Word.  Therefore, God is able to keep “his descendants (from) begging bread.”  It’s like handing over the keys of knowledge, so your children have a future.