צִנִּ֣ים פַּ֭חִים בְּדֶ֣רֶךְ עִקֵּ֑שׁ שׁוֹמֵ֥ר נַ֝פְשׁ֗וֹ יִרְחַ֥ק מֵהֶֽם׃
Ciernie i zasadzki są na drodze przewrotnego, kto życia swego strzeże, stroni od nich.
Radak
אסון, a mishap brought about either by man or by direct heavenly intervention, a natural disaster, for instance. Yaakov’s fear was based on a mishap having befallen Joseph at the time (as he had been led to believe). The Talmud in Ketuvot 30 describes mishaps caused by “man” as thorns and thistles, and the like. [based on Proverbs 22,5. The assumption appears to be that such “mishaps” are preventable by man being careful.] We may well ask why Yaakov was afraid of a mishap that might befall Binyamin while he was on the way more than he was afraid of a mishap which might befall him at home? The answer is that mishaps which befall people on a journey are statistically far more frequent than those that befall a person while he is at home. Wild animals, bandits, etc., are usually roaming on much traveled routes. Due to the likelihood of encountering such hazards while traveling, even righteous people who have no reason to fear G’d’s retribution for any wrongs they may have committed, need to be especially careful in any situation which is known to be especially hazardous, and they must not ignore such dangers by relying on G’d to keep them safe. Even if they would be saved from some danger through a miracle G’d would perform for them, their accumulated merits would be diminished thereby. Our sages have found an allusion to all this in Deuteronomy 6,15 לא תנסו את ה' אלוקיכם, “do not cause the Lord your G’d to have to perform a miracle for you.” We find proof that even an outstanding man such as the prophet Samuel when sent to anoint a successor to King Sha-ul and setting out on the way to Chevron to anoint one of Yishai’s sons, was afraid and said so to G’d. G’d Himself told him what precautions to take. (Samuel I 16,2) In view of the above it is not surprising therefore that Yaakov was especially concerned about Binyamin’s safety during the journey.
Bartenura
חלה ונתרפא – if he became sick by accident, meaning to say, that he was not negligent with himself and he is cured from the estate, but if he got sick from blowing cold winds/cold draughts, and similar things, and it is written concerning it (Proverbs 22:5): “Thorns and snares are in the path of the crooked; [He who values his life will keep far from them],” in this we state in our Mishnah that he is not healed other than from what is his.
From David to Destruction
Indeed, the Gemara (Ketubot 30a) teaches: "All is in the hands of Heaven except for Tzinim and Pachim." The meaning of the phrase "Tzinim and Pachim" is based on the verse “Tzinim Pachim BaDerech Ikeish Shomeir Nafsho Yirechak MeiHem,” "thorns (Tzinim) and snares (Pachim) are in the path of the perverse; he who guards his soul will distance himself from them" (Mishlei 22:5). Rashi explains that dangers exist in the world, particularly for those who are "perverse," that is, for those who don't try to avoid them, but the cautious person takes heed not to be harmed by them.