لَعَمرُكَby your life ماnot إِنreinforces the negation لَهُfor him صَخرَةًa rock
لَعَمرُكَ ما إِن لَهُ صَخرَةً
لَعَمرُكَby your life ماnot إِنreinforces the negation لَهُfor him وَزَرa refuge
لَعَمرُكَ ما إِن لَهُ وَزَر
By your life, he has no rock.
By your life, he has no refuge.