Surah Al-Kahf 18:95

قَالَ مَا مَكَّنِّى فِيهِ رَبِّى خَيْرٌ فَأَعِينُونِى بِقُوَّةٍ أَجْعَلْ بَيْنَكُمْ وَبَيْنَهُمْ رَدْمًا

He said, "That in which my Lord has established me is better [than what you offer], but assist me with strength [i.e., manpower]; I will make between you and them a dam.

Translation: Saheeh International

Tafsir

He said ‘That wealth and so on wherewith my Lord has empowered me makkannī a variant reading has makkananī is better than the tribute that you offer me and so I have no need for it. I shall build for you the barrier without demanding a fee; …

Excerpt from Tafsir al-Jalalayn, commentary on 18:95, via Quran.com. The reader has the full commentary and 9 more tafsirs.