Matthew 12:4

4how he entered the house of God and they ate
The Greek verb ἔφαγεν (efagen, “he ate”) is found in a majority of witnesses (Ƥ70 C D L W Θ f1, 13 33 Maj. latt sy co) in place of ἔφαγον (efagon, “they ate”), the wording found in א B pc. ἔφαγεν is most likely motivated by the parallels in Mark and Luke (both of which have the singular).
the sacred bread,
Grk “the bread of presentation.”
The sacred bread refers to the “bread of presentation,” “showbread,” or “bread of the Presence,” twelve loaves prepared weekly for the tabernacle and later, the temple. See Exod 25:30; 35:13; 39:36; Lev 24:5–9. Each loaf was made from 3 quarts (3.5 liters; Heb “two tenths of an ephah”) of fine flour. The loaves were placed on a table in the holy place of the tabernacle, on the north side opposite the lampstand (Exod 26:35). It was the duty of the priest each Sabbath to place fresh bread on the table; the loaves from the previous week were then given to Aaron and his descendants, who ate them in the holy place, because they were considered sacred (Lev 24:9). See also Mark 2:23–28, Luke 6:1–5.
which was against the law
Jesus’ response to the charge that what his disciples were doing was against the law is one of analogy: “If David did it for his troops in a time of need, then so can I with my disciples.” Jesus is clear that on the surface there was a violation here. What is not as clear is whether he is arguing a “greater need” makes this permissible or that this was within the intention of the law all along.
for him or his companions to eat, but only for the priests?
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