Is it obligatory for one who intentionally abandoned prayer and then committed to it to pronounce the Two Testimonies and perform ghusl, or is it sufficient to merely continue praying?

The disagreement regarding making up intentionally missed prayers is not based on deeming the prayer-leaver an unbeliever. The fatwa issued is based on the opinion of the majority of scholars, which states that the prayer-leaver does not exit the fold of Islam. Uttering the two testimonies of faith and performing a ritual bath are not required; rather, repentance for abandoning prayer is obligatory. According to the majority of scholars, part of perfect repentance is making up the missed prayers, while others hold that performing supererogatory prayers and seeking forgiveness are sufficient.