We keep the leftovers of cooked food in the fridge without heating it. We then take this food out of the fridge and heat it and eat it. The food stays out for a long time from the time it is cooked until it is put in the fridge, during this time there is a good chance of getting infected by germs in various ways. There is no reason to think that if you heat the food for the second time, it is safe. Because heating will kill the germs in the food, but the toxins released by the germs remain. Eating this food will cause food poisoning. It may cause nausea or vomiting, along with stomach pain or diarrhea. Usually, this symptom occurs within two to four hours (range 1-8 hours) after eating.So everyone should refrain from eating food in the fridge. If there is no other way, separate the extra food after cooking, cover it in a sterile container (do not keep it open, do not touch it with your hands), and then refrigerate it. If that is not possible, heat the food before storing it in the refrigerator. The most difficult problem may be with foods that are less seasoned, such as vegetables, lentils, bhaji, bharta, etc.