Tina Knowles eloquently penned a Mother's Day letter to her daughters Beyonce and Solange, as well as her honorary daughter, Kelly Rowland, and her niece, Angie Beyince in Time magazine. 

Knowles gushed about her "four incredible daughters," although only Beyonce and Solange are her biological daughters. 

"The obvious things about all of you are apparent," wrote Knowles. "You are all strong, beautiful, intelligent and smart businesswomen. You are so much more than that. You are all kind, generous and you treat people well. You are all amazing mothers, wives, daughters, sisters and friends. All of you have total self-respect."

She continued to address each of her daughters individually complimenting Beyonce on staying "grounded" despite her stardom; Solange on always fighting for what she believes in; Rowland for being a loyal friend and a great listener; and Beyince for being mature for her age and taking care of her other sisters when they needed her help. 

Knowles also detailed how her daughters nurtured her when she was grieving her divorce with Matthew Knowles after 33 years together. 

But the best thing about her daughters, said Knowles, is the individual speeches they gave her at her recent wedding. 

"I'm often asked, what was my most proud moment? I would have to say it was at my recent wedding, when all four of you said in your own words that I taught by example and that I helped to make you the women you are today!!!! That was truly my proudest moment!"

Read the full letter here.