It is not obligatory to perform Ghusl after repentance

Q: Is it obligatory to perform Ghusl (ritual bath) after sincere Tawbah (repentance to Allah)? Are there supplications reported from the Prophet (peace be upon him) to be said during these times?

A: All praise be to Allah Alone, and peace and blessings be upon His Messenger, and his family and Companions. No Ghusl is required after sincere Tawbah from sins, because the basic principle is that it is not prescribed by Shari‘ah (Islamic law), and we do not know of any evidence stipulating the contrary, unless it is Tawbah after renouncing Kufr (disbelief). In such a case, it is prescribed for whoever converts to Islam to perform Ghusl, because the Prophet (peace be upon him) commanded Qays ibn `Asim to do this when he converted to Islam. Related by Imam Ahmad, Abu Dawud, Al-Tirmidhy, and Al-Nasa'y and it was classed as Sahih (authentic) by Ibn Al-Sakan. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.