Matthew 7:6

7:6 Do not give what is holy to dogs or throw your pearls before pigs; otherwise they will trample them under their feet and turn around and tear you to pieces. ¹ 

Matthew 10:14

10:14 And if anyone will not welcome you or listen to your message, shake the dust off ²  your feet as you leave that house or that town.

[7:6]  ¹ tn Or “otherwise the latter will trample them under their feet and the former will turn around and tear you to pieces.” This verse is sometimes understood as a chiasm of the pattern a-b-b-a, in which the first and last clauses belong together (“dogs…turn around and tear you to pieces”) and the second and third clauses belong together (“pigs…trample them under their feet”).

[10:14]  ² sn To shake the dust off represented shaking off the uncleanness from one’s feet; see Luke 10:11; Acts 13:51; 18:6. It was a sign of rejection.