Walid Jumblatt will continue to serve as an MP and leader of the Progressive Socialist Party (PSP)until the next elections, when he will step down in favour of his son, Taymour.
"Walk forward with your head held high, and carry the legacy of your grandfather," Walid said to his son on the fortieth anniversary of his father's assassination.
"Carry the heritage of your wonderful grandfather and raise high the banner of occupied Arab Palestine."
Kamal Jumblatt, Walid's father and Taymour's grandfather, founded the PSP and fought to establish a non-sectarian political system in Lebanon that also respected the rights of Palestinians.
To signify Kamal's continued support for the Palestinian cause, Walid placed a traditional Palestinian kuffiyah scarf over Taymour's shoulders.
"Walk forward with your head held high, and carry the legacy of your grandfather," Jumblatt said.
"Carry the heritage of your wonderful grandfather and raise high the banner of occupied Arab Palestine."
Kamal Jumblatt was shot and killed along with his driver and bodyguard during the early days of the Lebanese civil war in 1977.
Walid Jumblatt has publicly accused the previous Syria president, Hafez al-Assad, Bashar's father of murdering his father.
After the assassination of his father, Walid Jumblatt took over the political leadership and was became of the main figures in the conflict.