Assalaamu alaykum. I always perform the Sunnah ghusl (ritual bath) from janabah (state of major ritual impurity). Recently, I feel that I have unintentionally neglected washing the interior part of the ears (not the ear canal). I always wash behind the ears and wipe them during the wudu (ablution) part of ghusl, but I strongly suspect that I have not been washing the interior. What is the ruling on the prayers that I have previously offered?

All perfect praise be to Allaah, The Lord of the worlds. I testify that there is none worthy of worship except Allaah and that Muhammad, sallallaahu ʻalayhi wa sallam, is His slave and Messenger. 

It is obligatory to wash the interior and exterior part of the ears in ghusl. Doubts which occur after finishing the act of worship are not to be taken into consideration and should simply be disregarded. Hence, if you doubt having washed any body part that must be washed during ghusl after having finished the ghusl, then the basic principle is that your ghusl is valid, and you should not pay attention to such doubts.

As long as it is only a doubt (that does not amount to certainty), then your prayers are valid and you are not obliged to repeat them because your ghusl is ruled valid according to the sharee'ah.

For more benefit, please refer to fatwa 119112.

Allaah knows best.