The nation will say goodbye to President George H.W. Bush this week, as his casket is set to arrive in Washington on Monday and lie in state at the Capitol Rotunda until Wednesday morning. His service dog, Sully, will be accompanying the former president, CNN reports.

This week’s trip will be the yellow Labrador’s last time at Bush’s side, as he will soon go back into the line of duty helping other veterans.

"As much as our family is going to miss this dog, we're comforted to know he'll bring the same joy to his new home, Walter Reed, that he brought to 41," former President George W. Bush wrote on Instagram, sharing an image of Sully sleeping in front of the casket.

Sully can perform a two-page list of commands, including answering the phone and fetching items. "As one person said, he can do just about anything except make you a martini, but not to worry, he can go get you someone to make you a martini," McGrath said in June. He was trained by America's VetDogs and developed his own huge following on Instagram, @sullyhwbush. America's VetDogs is a charity that provides service dogs to veterans, active-duty service members and first responders with disabilities. Sully went to work with Bush this summer after former first lady Barbara Bush passed away earlier this year. (CNN)

Bush's funeral in Washington, D.C. will be at 11 a.m. on Wednesday at the Washington National Cathedral.