وَقَاسَمَهُمَآ إِنِّى لَكُمَا لَمِنَ ٱلنَّـٰصِحِينَ

Waqasamahuma innee lakumalamina annasiheen

And he swore [by Allāh] to them, "Indeed, I am to you from among the sincere advisors."