The incident happened in the penultimate over of South Africa's innings.
During the 18th over of South Africa’s innings, Ashwin stopped mid-way through his run-up upon realising that Miller appeared to be leaving his crease early.
On this occasion, Ashwin gave a stern warning to Miller without saying a word but by simply staring at him. As soon as Miller realised that Ashwin had seen him moving out of his crease, he backed up.
Here’s the video:
Notably, Ashwin's act of running out Rajasthan Royals' (RR) Jos Buttler for backing up too far as captain of Kings XI Punjab (now Punjab Kings) in IPL 2019 had triggered a massive uproar and polarised opinions.
While many had supported him as run-out at the non-striker’s end is within the laws of the game, some cited the spirit of the game to crucify his antics.