Al-Kahf 18:90

Hatta itha balagha matliAAaashshamsi wajadaha tatluAAu AAalaqawmin lam najAAal lahum min dooniha sitra

Until, when he came to the rising of the sun [i.e., the east], he found it rising on a people for whom We had not made against it any shield.

until when he reached the point of sunrise, he found it rising over a people for whom We did not make any shelter against it.