JMNT(i)
6 And so, making haste, he climbed down and received Him as a guest, under [his roof], while continuously rejoicing.
7 Then, upon seeing [this], all [the crowd] began buzzing throughout with muttered complaints, one to another saying, "He goes in (enters) to loose-down (= relax and lodge for the night) beside (= in company with) an adult man [who is] an outcast (a sinner; one who by way of life fails to attain the goal of a culturally accepted life)!"
8 Now being brought to a standstill [by this], Zacchaeus said to the Lord, "Look here, and consider! One half of my possessions (the things normally giving me sustenance), Lord (Master), I am habitually giving to the destitute folks. And if I extorted anything from anyone through what appeared as threat of accusation, I am habitually giving back (repaying) four times as much." [comment: an echo of the Law in Ex. 22:1. This would be an appeal to the Law, and thus, an affirmation that he lived by the Torah, and was not really a "sinner"]