Is a woman's ritual purity considered valid if she performs ghusl a day and a night after her menstruation has ceased, without checking the discharge, assuming that the cessation of menstruation is sufficient, and if she does not find menstrual blood on her clothes or body, does she consider herself pure without checking?

Not seeing blood on clothes is not enough; rather, one must verify the complete cessation of blood, yellowness (ṣufra), or brownish discharge (kudra) by inserting a piece of cotton. If it comes out clean, then purity has been attained. If purity is confirmed, prayer becomes obligatory immediately after ghusl (definition), and delay is not permissible. Whoever used to suffice with looking at clothes must repent and verify her purity. As for the prayers she missed due to ignorance or prayed without ghusl, she is not required to make them up, according to a group of scholars.