Quran 15:99

And go on worshipping your Lord till the certainty (of death) comes upon you.

and worship your Lord until certainty comes to you.

And keep worshipping your Lord, till death* comes to you. (* The certainty.)

and serve thy Lord, until the Certain comes to thee.

And worship your Lord until comes to you the certainty.

And worship thy Lord until there cometh unto thee the certainty.

And worship your Lord until there comes unto you the certainty (i.e. death).

and worship your Lord until the last moment (of your life) that will most certainly come.

Worship your Lord until you achieve the ultimate certainty.

And serve your Lord until there comes to you that which is certain.

And serve thy Lord till the Inevitable cometh unto thee.

Worship your Lord till the certainty (death) comes to you.

And worship your Lord until there comes to you the certainty (death).

And worship your Lord in order to attain certainty.

and worship your Lord until what is certain [death] comes to you.

And serve thy Lord until there come unto thee the Hour that is Certain.