Duck Dynasty patriarch Phil Robertson passed away at the age of 79 on Sunday after he was diagnosed with Alzheimer's.

Phil Robertson's daughter-in-law, Kori Robertson shared the news on Facebook on Sunday.

"We celebrate today that our father, husband, and grandfather, Phil Robertson, is now with the Lord," Korie Robertson said.

"He reminded us often of the words of Paul, "you do not grieve like those who have no hope. For we believe that Jesus died and rose again, and so we believe that God will bring with Jesus those who have fallen asleep in him," she said.

"Thank you for the love and prayers of so many whose lives have been impacted by his life saved by grace, his bold faith, and by his desire to tell everyone who would listen the Good News of Jesus. We are grateful for his life on earth and will continue the legacy of love for God and love for others until we see him again," Korie added.