Q 12:68

وَلَمَّا دَخَلُوا۟ مِنْ حَيْثُ أَمَرَهُمْ أَبُوهُم مَّا كَانَ يُغْنِى عَنْهُم مِّنَ ٱللَّهِ مِن شَىْءٍ إِلَّا حَاجَةً فِى نَفْسِ يَعْقُوبَ قَضَىٰهَا ۚ وَإِنَّهُۥ لَذُو عِلْمٍ لِّمَا عَلَّمْنَـٰهُ وَلَـٰكِنَّ أَكْثَرَ ٱلنَّاسِ لَا يَعْلَمُونَ

Translations

And when they entered from where their father had ordered them, it did not avail them against Allah at all except [it was] a need within the soul of Jacob, which he satisfied. And indeed, he was a possessor of knowledge because of what We had taught him, but most of the people do not know.

Sahih International · EN

Etant entrés comme leur père le leur avait commandé [cela] ne leur servit à rien contre (les décrets d') Allah. Ce n'était [au reste] qu'une précaution que Jacob avait jugé [de leur recommander]. Il avait pleine connaissance de ce que Nous lui avions enseigné. Mais la plupart des gens ne savent pas.

Muhammad Hamidullah · FR

Tafsir

So they journeyed with Joseph’s full brother. When they entered through different gates, as their father had instructed them, it did not stop what Allah had decreed for them in any way. It was just Jacob’s concern for his sons which he showed, advising them, knowing that the decree is Allah’s alone. He knew what Allah had taught him in terms of faith in the divine decree and taking precautions, but most people do not know this.

Al-Mukhtasar fi Tafsir al-Quran · Tafsir Center for Quranic Studies

Read Ibn Kathir (Ibn Kathir (abridged, English))

And he said: "O my sons! Do not enter by one gate, but enter by different gates, and I cannot avail you against Allah at all. Verily, the decision rests only with Allah. In Him, I put my trust and let all those that trust, put their trust in Him. (67)And when they entered according to their father's advice, it did not avail them in the least against (the will of) Allah; it was but a need of Ya'qub's inner self which he discharged. And verily, he was endowed with knowledge because We had taught him, but most men know not (68) Ya'qub orders His Children to enter Egypt from Different Gates Allah says that Ya'qub, peace be upon him, ordered his children, when he sent Binyamin with them to Egypt, to enter from different gates rather than all of them entering from one gate. Ibn 'Abbas, Muhammad bin Ka'b, Mujahid, Ad-Dahhak Qatadah, As-Suddi and several others said that he feared the evil eye for them, because they were handsome and looked beautiful and graceful. He feared that people might direct the evil eye at them, because the evil eye truly harms, by Allah's decree, and brings down the mighty warrior-rider from his horse. He next said, وَمَا أُغْنِي عَنكُم مِّنَ اللَّهِ مِن شَيْءٍ (and I cannot avail you against Allah at all.) this precaution will not resist Allah's decision and appointed decree. Verily, whatever Allah wills, cannot be resisted or stopped, إِنِ الْحُكْمُ إِلَّا لِلَّهِ ۖ عَلَيْهِ تَوَكَّلْتُ ۖ وَعَلَيْهِ فَلْيَتَوَكَّلِ الْمُتَوَكِّلُونَ - وَلَمَّا دَخَلُوا مِنْ حَيْثُ أَمَرَهُمْ أَبُوهُم مَّا كَانَ يُغْنِي عَنْهُم مِّنَ اللَّهِ مِن شَيْءٍ إِلَّا حَاجَةً فِي نَفْسِ يَعْقُوبَ قَضَاهَا ("Verily, the decision rests only with Allah. In Him, I put my trust and let all those that trust, put their trust in Him." And when they entered according to their father's advice, it did not avail them in the least against (the will of) Allah; it was but a need of Ya'qub's inner self which he discharged.), as a precaution against the evil eye, وَإِنَّهُ لَذُو عِلْمٍ لِّمَا عَلَّمْنَاهُ (And verily, he was endowed with knowledge because We had taught him,) he had knowledge that he implemented, according to Qatadah and Ath-Thawri. Ibn Jarir said that this part of the Ayah means, he has knowledge that We taught him, وَلَٰكِنَّ أَكْثَرَ النَّاسِ لَا يَعْلَمُونَ (but most men know not.)

Arabic text: Tanzil (Uthmani). Translations: Sahih International (en), Muhammad Hamidullah (fr). tanzil.net