Don't count your chickens before they hatch
dʒaŋan məŋirə anaʔ ajam səbəlom mənɛtas
In Malay Jangan mengira anak ayam sebelum menetas.
This proverb is a direct equivalent, warning against counting on something before it's certain.
Example
"Dia sudah meraikan, tetapi saya berkata, 'Jangan mengira anak ayam sebelum menetas.'"
