બીગડી સો સમરે નહીં, ફાટી ખરચા દામ;

bīgaḍī sō samarē nahīṁ, phāṭī kharacā dāma;

Literally: What is ruined is not mended; what is torn costs money.
What it means: Regret cannot undo ruined matters, and repairing damage always demands a price.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.