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A teacher is thanking a woman she met at church for answering her prayers and donating a kidney to save her life.

Erica Walker of Memphis, Tenn., is a single mom and a teacher. When she was diagnosed with renal failure as a consequence of diabetes, she worried if she’d live to see her 2-year-old daughter Karli’s first day of kindergarten. She asked the congregation at Heartstrong Church for prayers, which led to her getting a life-saving kidney transplant from churchgoer Jenny Williams. Williams, a mother of five, got tested and ended up being a perfect match for Walker.

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“I just felt called to do it,” said Williams. “I felt it was something that God wanted me to do. Why else would we have met each other? The thought of Karli not having a mom – I couldn’t do nothing when I knew there was something that I could do.”

After undergoing months of tests, doctors performed the transplant earlier this month. Both women are recovering at home.

“She’s just my hero,” said Walker. “She’s changed my entire family’s life by one decision that she made.”

Williams said she hopes her story inspires other to become organ and blood donors.

“If you have the opportunity to save somebody’s life by doing something relatively easy, you just do it. Even giving blood is so important,” Williams told ABC News.