Saudi Arabia's King Salman was admitted to the King Faisal Specialist Hospital in Jeddah on Saturday for medical examinations, the royal court said.
The official Saudi Press Agency reported on Sunday that King Salman had undergone a colonoscopy and the "result was sound".
The UAE's leaders offered their best wishes to King Salman for his good health as well as wishing Saudi Arabia and its people "further progress, prosperity, security and peace".
The President, Sheikh Khalifa, Sheikh Mohammed bin Rashid, Vice President and Ruler of Dubai, and Sheikh Mohamed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the Armed Forces, sent congratulatory messages after the successful procedure, state news agency Wam reported.
King Salman was last in hospital in March, when he underwent several medical tests at the King Faisal Specialist Hospital in Riyadh and doctors also changed the batteries of his pacemaker.
He spent ten days at the hospital in Riyadh at the time, and travelled several weeks later to the seaside megacity project Neom for a period of rest and recovery.
In July 2020, King Salman underwent a successful operation to remove his gallbladder after he was first admitted to King Faisal Specialist Hospital that summer, following an inflammation.