This is not a slang, but a popular Spanish proverb that translates to 'God helps those who rise early.' It is used to convey the idea that those who make the effort to wake up early or those who start working on something early have an advantage and are more likely to succeed.
Examples
- Spanish: Si quieres tener éxito en tus estudios, recuerda que 'al que madruga, Dios lo ayuda'. Así que no te quedes hasta tarde jugando videojuegos.
- English: If you want to succeed in your studies, remember that 'God helps those who rise early.' So don't stay up late playing video games.