Why do shia Muslims offer namaz e zohar and asar together?

Shia Muslims often combine the Dhuhr (Zohar) and Asr prayers due to the belief that the Prophet Muhammad practiced this during his lifetime, particularly in certain circumstances such as travel or when facing difficulties. This practice is based on interpretations of hadiths that suggest the Prophet offered these prayers together to facilitate worship and maintain the community's spiritual health. Additionally, it allows for greater flexibility in daily schedules, ensuring that congregational prayers can be more easily attended.