In The Bronze Bow, when does Daniel break a rule, and what is the rule that he breaks?

Daniel breaks a religious rule in Chapter 7 of The Bronze Bow. In Chapter 6, Daniel has an interaction with a Roman soldier that results in Daniel getting wounded by a spear. He flees and manages to make it to Joel and Malthace's house before he passes out from the trauma of his wound. Joel and Thacia hide him in a passageway of their home, keeping him a secret from their family. Here, in Chapter 7, Daniel gets to know Joel and Thacia better. They discuss their Jewish faith, read Scripture together, and talk about their hoped-for deliverance from Roman oppression. They read the passage from the Psalms that speaks of the bronze bow, and they make a vow together to fight "for God's victory." Daniel has been getting stronger and feels like he is ready to go back to the mountain. However, it is the Sabbath (Saturday), and their religious law forbids Jews to walk "more than two thousand cubits from home" on the Sabbath because it is a day of rest. Daniel knows he is breaking this rule, but he feels he has broken so many laws already that he is "beyond all redemption." He thinks that "the Law was for the wealthy, for the scholars, not for the poor." So he leaves and returns to his mountain home, which is a violation of the rule prohibiting long travel on the Sabbath.