In what scriptures do you find statements that women are not competent for knowledge and devotion?

In what scriptures do you find statements that women are not competent for knowledge and devotion? In the period of degradation, when the priests made the other castes incompetent for the study of the Vedas, they deprived the women also of all their rights. Otherwise you will find that in the Vedic or Upanishadic age Maitreyi, Gargi, and others ladies of revered memory have taken the places of rishis through their skill in discussing about Brahman.

In an assembly of a thousand Brahmanas who were all erudite in the Vedas, Gargi boldly challenged Yajnabalka in a discussion about Brahman. Since such ideal women were entitled to spiritual knowledge, why shall not the women have the same privilege now? What has happened once can certainly happen again. History repeats itself.

All nations have attained greatness by paying proper respect to women. That country and that nation which do not respect women have never become great, nor will ever be in future. The principal reason why your race has so much degenerated is that you have no respect for these living images of Shakti. Manu says, "Where women are respected, there the god delight; and where they are not , there all works and efforts come to naught." There is no hope of rise for that family or country where there is no estimation of women, where they live in sadness. For this reason they have to be raised first.
~Swami Vivekananda