કરે વિચારી કાજ, જરૂર એવા જાણીઆ;

karē vicārī kāja, jarūra ēvā jāṇīā;

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · read from the scan by machine — the Gujarati itself is unchecked · awaiting its meaning

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