The incident happened in the 25th over of Mumbai's second innings on day 2 at the Bandra Kurla Complex Cricket Ground on Friday.
source https://sports.ndtv.com/ranji-trophy/bizarre-scenes-as-umpires-call-ajinkya-rahane-back-from-dressing-room-shardul-thakur-told-to-7549870#rss-sports-cricket
source https://sports.ndtv.com/ranji-trophy/bizarre-scenes-as-umpires-call-ajinkya-rahane-back-from-dressing-room-shardul-thakur-told-to-7549870#rss-sports-cricket