Source for learning the entire Torah

Hi, I'm looking for a source that states that a man must know or learn the entire Torah. Do you know of any? Thanks,

The source of this law is the following Talmudic passage (tractate Kiddushin 30a): ‘To what extent is one obligated to teach his son Torah? Rav Yehuda says that Shmuel says: One should emulate the education of Zevulun, son of Dan, whose father’s father taught him Scripture, Mishnah, Gemarah,  halakhot , and  aggadot ’.

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