Rob, who lived with Odom for years, took to Instagram on Wednesday to share an emotional message of hope.
There is no shortage of love, compassion and prayer for Lamar Odom, who remains hospitalized in a Las Vegas hospital, and on Wednesday evening, Rob Kardashian shared his own tribute to the former NBA star.
Rob, brother of Odom's ex Khloe Kardashian, took to Instagram to share a heartfelt photo of himself and the 35-year-old in happier times.
WATCH: Lamar Odom's Friends and Former Teammates Offer Prayers and Support: 'He's a Fighter'
Rob, who lived with Odom and his sister for years while they were married, captioned the photo, "Praying nonstop for my Brother !!"
Odom was found unconscious at the Love Ranch brothel in Crystal, Nevada on Tuesday and has remained hospitalized at Sunrise Hospital in Las Vegas. The circumstances surrounding the incident are still being investigated.
As reported on Tuesday, despite Lamar and Khloe's split, the Kardashian-Jenner family have never stopped caring for the 35-year-old former Los Angeles Lakers star, according to an ET source, and rushed to his bedside after being informed of his condition.
WATCH: Kardashian-Jenner Family 'Still Loves' Lamar Odom, Source Says, He 'Just Has Very Bad Demons'
Earlier Wednesday, Rob’s mother Kris Jenner took to Twitter asking her followers to "Please pray for Lamar." Kendall Jenner, Khloe's half-sister, also shared an emotional tweet, writing early Wednesday morning, "Please don't go."
please don't go.
— Kendall Jenner (@KendallJenner) October 14, 2015WATCH: Lamar Odom Struggled in Las Vegas, Was 'Pretty Much Broke,' Source Says
There has been an outpouring of support and well-wishes for Odom since news of his hospitalization broke, with countless friends and former teammates sharing their love on social media. Check out the video below to see how some of Odom’s closest friends reacted to the news.