According to the Islamic scholars and the fatwa given in the texts, Hazrat Abdullah bin Amr said that he saw the Prophet Muhammad peace be upon him counting tasbeeh on his hand. Ibn Qudama explains that this refers to the right hand. Hazrat Aisha also said that the Prophet peace be upon him used his right hand for clean actions and his left hand for disliked actions. Because of these hadiths, the jurists say that doing tasbeeh with the right hand after prayer is better. However, using the left hand is also allowed. This is the Islamic ruling based only on the provided evidence.