જે વરસે મઘા, તો ધાનના થાય ઢગા.

jē varasē maghā, tō dhānanā thāya ḍhagā.

Literally: If it rains in Magha, then there will be heaps of grain.
What it means: Rain during the Magha constellation guarantees a bountiful harvest.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) · 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.