દાઢીમૂછ આવશે તો દીકરાને આવશે.

dāḍhīmūcha āvaśē tō dīkarānē āvaśē.

Literally: If the beard and mustache come, they will come to the son.
What it means: Certain things happen in their own time and cannot be forced.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) 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.