Definition & Meaning of "family that prays together stays together"

What is the origin of the proverb "family that prays together stays together" and when to use it?

The origin of the proverb "family that prays together stays together" is believed to have been popularized in the 1940s by the Reverend Patrick Peyton, an Irish Catholic priest. Reverend Peyton strongly advocated for family prayer, believing that it helped to strengthen family bonds and promote harmony. Over time, the saying has been used to express the idea that families who share spiritual practices or values are more likely to remain close and united, as praying together fosters a sense of support, unity, and shared purpose.