I didn't want to post specifics before, but he had lung issues for a few years. His body was tired the last thing I told him was that we all love him, it's OK to let go, and we would take care of my mom for him. He passed away before I got back to the hospital to end his care.
I'm so sorry for your loss. I had a very similar moment with my father, saying some of the same things before he passed, and it did bring me some comfort. I hope you are able to get through the next few days/weeks with strength.