Hang on somebody’s words/on somebody’s every word
Definition 1 of 1
Pro Tip 1/3Emotional Impact
The phrase often implies admiration or deep interest in the speaker's words. 
The children hung on the storyteller's every word, captivated.
Pro Tip 2/3Visual Imagery
Imagine clinging to each word as if they were objects, showing the intensity of focus. 
During the lecture, everyone hung on the professor’s words, envisioning the concepts.
Pro Tip 3/3Conversation Cue
Use the phrase to express that someone's speech is worth giving your full attention. 
At the meeting, we all hung on her every word about the new project.