Is one who dies upon the oneness of Allah, even if he did not know its implications, a disbeliever?

The questioner : Is it true that one who dies upon the oneness of Allah, even if he did not act upon its implications—and the first implication of the oneness of Allah is establishing the prayer—is he a disbeliever and will he remain forever with the eternal disbeliever in the Fire of Hell, or not?

The Shaykh : The Salaf distinguished between faith and deeds. They made faith a condition, just as they made deeds a condition for the perfection of faith, but they did not make them a condition for its validity, contrary to the Khawarij. This answer is clear.