The jet was bound for Kuala Lumpur when the mother suddenly told airline staff that she needed to return immediately to Jeddah, Gulf News reported.
A video of the moment the pilot tells the ground crew of their plight exists and has gone viral on social media (see below).
In the clip, the pilot is heard asking air traffic control staff, “Can we come back or what?”
After noting the flight number — SV832 — the operator asks a colleague for guidance.
“This flight is requesting to come back … a passenger forgot her baby in the waiting area, the poor thing,” the pilot added.
When air traffic control asked the pilot to confirm the story, he replied: “We told you, a passenger left her baby in the terminal and refuses to continue the flight.”