Serendipity
In Persian اتفاق خوشایند و غیرمنتظره (ettefāgh-e khoshāyand va ghayr-e montazereh) / بخت و اقبال (bakht o eqbāl) – but with more emphasis on the accidental nature
The occurrence and development of events by chance in a happy or beneficial way.
Example
"Finding that antique book was pure serendipity."
