ચંદા વેરી વાદળાં, જળ વેરી શેવાળ; પુરૂષ વેરી ઊંઘ છે, માછલી વેરી જાળ.

caṁdā vērī vādaḷāṁ, jaḷa vērī śēvāḷa; purūṣa vērī ūṁgha chē, māchalī vērī jāḷa.

Literally: Clouds are the enemy of the moon, moss is the enemy of water; sleep is the enemy of man, and the net is the enemy of fish.
What it means: Every entity has a natural adversary or obstacle that hinders its progress or threatens its existence.

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.