Hu calligraphy

This sentence is an interpretation of a sentence written by Huang Ziyuan, a great calligrapher in the late Qing Dynasty, and the clue of this sentence is: It is so pleasant to seal a mother's bill and celebrate her 60th birthday. Huang Ziyuan, the waiter, bowed to the book. It seems like a gift to congratulate someone's mother on her sixtieth birthday. But I didn't find anything suspicious about this sentence. I guess it's from Buddhist scriptures. I wonder where the landlord saw it.