Imamat 11:27

11:27 All that walk on their paws among all the creatures that walk on all fours ¹  are unclean to you. Anyone who touches their carcass will be unclean until the evening,

Imamat 11:47

11:47 to distinguish between the unclean and the clean, between the living creatures that may be eaten and the living creatures that must not be eaten.’”

Kisah Para Rasul 10:14

10:14 But Peter said, “Certainly not, Lord, for I have never eaten anything defiled and ritually unclean!” ² 

[11:27]  ¹ tn Heb “the one walking on four.” Compare Lev 11:20-23.

[10:14]  ² tn Possibly there is a subtle distinction in meaning between κοινός (koinos) and ἀκάθαρτος (akaqarto") here, but according to L&N 53.39 it is difficult to determine precise differences in meaning based on existing contexts.

[10:14]  sn Peter insisted he would not violate the law by eating anything defiled and ritually unclean. These food laws were one of the practices that distinguished Jews from their Gentile neighbors. The practice made table fellowship with Gentiles awkward. For an example of Jewish attitudes to this, see Dan 1:8-16; 1 Macc 1:41-64; Letter of Aristeas 142; Tacitus, History 5.5.