١٥ : ٩٩
وَٱعۡبُدۡ رَبَّكَ حَتَّىٰ يَأۡتِيَكَ ٱلۡيَقِينُ
and worship your Lord until the certainty [of death] comes to you.
Ayah ٩٩ of الحِجر (١٥ : ٩٩). This page carries the verse in the Uthmani script with a translation of its meaning, at a stable URL that can be cited on its own.
وَٱعۡبُدۡ رَبَّكَ حَتَّىٰ يَأۡتِيَكَ ٱلۡيَقِينُ
and worship your Lord until the certainty [of death] comes to you.