Tina Knowles shared her love for the four women she considers daughters this week.

The 61-year-old designer penned an open letter to daughters Beyoncé and Solange Knowles, singer Kelly Rowland and niece Angie Beyince for Time magazine in honor of Mother's Day.

"I gave birth to two of you, but I have four incredible daughters," she wrote. "Writing this brought to mind all the ways you guys have been such a blessing to me."

"You are all strong, beautiful, intelligent and smart businesswomen," she lauded. "You are all kind, generous and you treat people well. You are amazing mothers, wives, daughters, sisters and friends. All of you have total self-respect."