Is ritual bathing (Ghusl) obligatory upon an unbeliever upon embracing Islam for pre-existing major ritual impurity (Janabah)?

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Ritual bathing for major ritual impurity (Janabah) is not obligatory upon an unbeliever who subsequently embraces Islam, whether they performed a bath during their state of disbelief or refrained from doing so. This is the opinion held by those who mandate the 'Ghusl of Islam' and the view of Abu Hanifa. The justification for non-obligation rests on the principle that the lack of religious obligation (taklīf) prior to conversion does not necessitate subsequent obligation, similar to minors or the insane. Furthermore, any bath taken while in disbelief does not remove the state of impurity, just as minor ritual impurity is not removed while one remains a disbeliever. The primary evidence is that there is no transmitted report from the Prophet (peace be upon him) indicating he commanded any of the numerous adult male and female converts to perform a Ghusl for Janabah. Additionally, the perceived condition (Mudhannāh) takes the place of the actual state of impurity, thus nullifying the ruling of the impurity, akin to excusing travel when hardship is present.