In which law of thermodynamics, energy neither be created nor destroyed?

In which law of thermodynamics, energy neither be created nor destroyed?

تھرموڈینامکس کے کس قانون میں توانائی کو نہ تخلیق کیا جا سکتا ہے اور نہ ہی تباہ کیا جا سکتا ہے؟
Explanation

The first law of thermodynamics is based on "

the law of conservation of energy, which states that energy cannot be created or destroyed, but can be transferred from one form to another".