وَقَاسَمَهُمَآ إِنِّى لَكُمَا لَمِنَ ٱلنَّٰصِحِينَ
And he swore [by Allah] to them, "Indeed, I am to you from among the sincere advisors."
(And he swore unto them (saying): Lo! I am a sincere adviser unto you) in my oath that this is the tree of immortality.