Social media posts with the hashtag “Qaboos in our Hearts” accompanied words and archival footage of the long-time ruler.
“The 10th of January, an important day in Oman with a deep sorrow in the hearts of its people. Our loyal father has departed, leaving behind a great, immortal legacy,” Twitter user Al Sheibah Khalfan wrote, along with a video of Sultan Qaboos in military uniform.
Hameed Al Blooshi posted a poem, with black and white photos of Sultan Qaboos in his youth and pictures of his funeral.
“We miss you father on a night like this,” part of the poem said.
Former Shura Council member Ishaq Alsiabi recalled a conversation he had with Sultan Qaboos when Mr Alsiabi was seven years old.
“Golden moments that cannot be forgotten. With his humility Sultan Qaboos planted in our hearts loyalty and love. So he will always remain #Qaboos in our hearts,” he wrote.
The Port of Salalah's official account quoted Sultan Qaboos's calls for environmental preservation.
“'We must cherish and preserve this land from all those who wish to tamper with its beautiful, God-given nature.' Immortal words uttered by Sultan Qaboos on Omani Environment Day,” a post read.
Lecturer and PhD student Yusuf Al Hasani said: “You were and still are the father whose love is endless” along with a video of the Sultan and Surat Al Fatiha, often read by Muslims over the dead.
People from neighbouring countries also joined in remembrance.
Saudi writer Khaled Al Sabe wrote: “The Sultan of peace, the Sultan of hearts. This man who created a great nation and delivered the trust and departed. He left behind a strong, solid and cohesive country with the whole world. May your soul rest in peace, the greatest and purest of men.”