Lamar, 39, hoisted Sabrina up for some major PDA in the romantic pic.
"I never thought I’d feel this way again... love you queen," he captioned.
Lamar also added the hashtags #newchapters and #parrlamar to the post.
Fans continued to show their support for him in his budding relationship. "So nice to see you happy and healthy," one wrote.
Lamar and Sabrina became social media official on Friday, August 2. He posted a photo of them with her lounging in his lap.
They were spotted out later that night on a date at Craig's in West Hollywood.
His ex-wife Khloe Kardashian issued her support over his new relationship. "Can't flex on me if I'm happy for you," she captioned one of her Instagram stories. "Go be great lol."
Do you think Sabrina is the one for Lamar? Sound off in the comments!