宝の山に入りながら手を空しくして帰る

たからのやまにいりながらてをむなしくしてかえる

[takaranoyamaniirinagaratewomunashikushitekaeru]

Definitions

1.expressions (phrases, clauses, etc.)

to have a good opportunity only to let it slip from your grasp; to come home empty-handed despite having entered treasure mountain