28:35
قَالَ سَنَشُدُّ عَضُدَكَ بِأَخِيكَ وَنَجْعَلُ لَكُمَا سُلْطَـٰنًا فَلَا يَصِلُونَ إِلَيْكُمَا ۚ بِـَٔايَـٰتِنَآ أَنتُمَا وَمَنِ ٱتَّبَعَكُمَا ٱلْغَـٰلِبُونَ
[Allah] said, "We will strengthen your arm through your brother and grant you both supremacy so they will not reach you. [It will be] through Our signs; you and those who follow you will be the predominant."
Context in Surah Al-Qasas
Nearby ayahs help place verse 28:35 in sequence and meaning.
قَالَ رَبِّ إِنِّى قَتَلْتُ مِنْهُمْ نَفْسًا فَأَخَافُ أَن يَقْتُلُونِ
He said, "My Lord, indeed, I killed from among them someone, and I fear they will kill me.
وَأَخِى هَـٰرُونُ هُوَ أَفْصَحُ مِنِّى لِسَانًا فَأَرْسِلْهُ مَعِىَ رِدْءًا يُصَدِّقُنِىٓ ۖ إِنِّىٓ أَخَافُ أَن يُكَذِّبُونِ
And my brother Aaron is more fluent than me in tongue, so send him with me as support, verifying me. Indeed, I fear that they will deny me."
فَلَمَّا جَآءَهُم مُّوسَىٰ بِـَٔايَـٰتِنَا بَيِّنَـٰتٍ قَالُوا۟ مَا هَـٰذَآ إِلَّا سِحْرٌ مُّفْتَرًى وَمَا سَمِعْنَا بِهَـٰذَا فِىٓ ءَابَآئِنَا ٱلْأَوَّلِينَ
But when Moses came to them with Our signs as clear evidences, they said, "This is not except invented magic, and we have not heard of this [religion] among our forefathers."
وَقَالَ مُوسَىٰ رَبِّىٓ أَعْلَمُ بِمَن جَآءَ بِٱلْهُدَىٰ مِنْ عِندِهِۦ وَمَن تَكُونُ لَهُۥ عَـٰقِبَةُ ٱلدَّارِ ۖ إِنَّهُۥ لَا يُفْلِحُ ٱلظَّـٰلِمُونَ
And Moses said, "My Lord is more knowing [than we or you] of who has come with guidance from Him and to whom will be succession in the home. Indeed, wrongdoers do not succeed."