Salah and Andy Robertson were both presented with gifts at the AXA Training Centre before the squad assembled for Slot to address them. Each departing player then spoke to the group.
"I don't want to be emotional today, because tomorrow is going to be an emotional day," Salah told his team-mates.
"But I really appreciate every moment I've had at this club. I've had a great time with all of you, and it's something I will take with me in the future. So thank you very much. Hopefully I'll see you soon again."
After Robertson had spoken, Salah interjected with a final word.
"Wait, one more thing I want to say. Being in Liverpool, winning for Liverpool and winning games is the best thing that could happen to you. I think this is the best club in the world when you win something and the worst club in the world when you lose. So you better win next year."
Liverpool released a video of the moment on the club's official X account, which was viewed millions of times within hours of posting.
The comment carries extra weight given the context of Salah's final season at Anfield. Liverpool enter Sunday needing a result against Brentford to secure Champions League qualification after what manager Arne Slot described this week as a season that fell well short of expectations. They have lost 12 Premier League matches — compared with four the previous season when they won the title.
Salah's exit has not been without friction. He publicly accused Slot of throwing him under the bus in December after being dropped for three consecutive league games, and last week's 4-2 defeat to Aston Villa was followed within 24 hours by a social media post in which he called for Liverpool to return to the "heavy metal attacking football that opponents fear" associated with Jürgen Klopp.
He leaves with 255 goals in 435 appearances — third on Liverpool's all-time scoring list, behind Roger Hunt and Ian Rush.
The farewell speech suggested the friction has been set aside, at least in public. What replaces him next season is the real question.