Sforno on Genesis 32:33/ספורנו על בראשית ל״ב:ל״ג

1על כן לא יאכלו בני ישראל, in order to ensure that the damage inflicted to Yaakov’s offspring as predicted by the angel should be kept to a minimum as long as they remind themselves of the symbolic meaning of that injury suffered by Yaakov during his nocturnal encounter with this angel. [I believe that even commentators who concentrate on the plain meaning of the text, such the ones whose commentaries I am translating in these volumes, feel free to treat the text allegorically when the narrative of the Torah itself appears pointless unless we understand it in historical terms, offering moral and ethical teachings and warnings of long term significance. Ed.] Alternatively, the moral lesson is that just as the gid hanashe is totally devoid of taste, does not appeal to the palate, so that consuming it would not provide the sinner with any kind of gratification, we are taught not to second-guess G’d’s legislation by treating this commandment as not important.