Yehezkiel 21:12

21:12 Cry out and moan, son of man,

for it is wielded against my people;

against all the princes of Israel.

They are delivered up to the sword, along with my people.

Therefore, strike your thigh. ¹ 

Yehezkiel 23:8

23:8 She did not abandon the prostitution she had practiced in Egypt; for in her youth men had sex with her, fondled her virgin breasts, and ravished her. ² 

[21:12]  ¹ sn This physical action was part of an expression of grief. Cp. Jer. 31:19.

[23:8]  ² tn Heb “and poured out their harlotry on her.”