This phrase is not necessarily slang, but rather a common saying or proverb in Spanish. It literally translates to 'One has to sow to harvest', meaning that you have to put in work or effort to see results or benefits.
Examples
- Spanish: Si quieres obtener buenas calificaciones, tienes que estudiar. Hay que sembrar para cosechar.
- English: If you want to get good grades, you have to study. You have to sow to harvest.