July 3, 2016 11:18 AM EDT

The father of two Texas sisters who were fatally shot by their mother laid his daughters to rest Saturday and urged his friends and family members not to take time with their loved ones for granted.

Jason Sheats bid farewell to his daughters, 22-year-old Taylor Sheats and 17-year-old Madison Sheats, at a memorial service in Decatur, Alabama before both were buried at Limestone Memorial Gardens, according to local TV station WAFF-TV.

The girls were killed late last month by their mother Christy Sheats, 42, who had convened a “family meeting” inside her Katy home before opening fire on them, authorities said. Jason Sheats was present but was unharmed.

Friends said Jason Sheats inspired those who attended the service with his strength and message after experiencing such a tragedy.

“He said, ‘If you have loved ones, tell them you love them every day and give them a hug because you never know it might be your last day,’” friend Marsha Hill told WAFF-TV. “He said one thing with his children he knows he has peace with, is that he loved his kids. His kids knew that he loved him, and his kids loved him. And he showed them and kissed them and loved him every day. That shows a lot.”

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