The Holy Prophet [s] said:
"Fie upon that Muslim who does not allocate (at least) one day a week to the study of the details of his religion and to explore (the affairs) of his religion."

Bihar-ul-Anwar, vol. 1, p. 176

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Imam Sadiq [a] said:
"If I see a young one from Shi'ah who does not have this program, I will teach him a lesson."
(Shi'ah youth should have religious instructional programs).

Bihar-ul-Anwar, vol. 1, p. 214