Al-Harith said: I saw Sayyiduna Ibn Mas'ud (may Allah be pleased with him) moistening the tip of his finger in his mouth, then saying: "By Allah, a servant will never taste the taste of faith until he believes in divine decree (qadar) and knows that he will die and then be raised again after death."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8757