pass the torch - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Also, hand on the torch. Relinquish responsibilities, a tradition, practice, or knowledge to another. For example, When the company's founder became too ill to continue, he passed the torch to his nephew. This metaphoric expression alludes to the ancient Greek torch race, in which a lighted torch was passed from one runner to the next. A translation from both Greek and Latin, the English version dates from the late 1800s.