The Prophet Muhammad :saw: said:
“God created Mercy (and) divided it into one hundred parts. He kept ninety-nine parts (of that Mercy) and sent one part to all His creatures. Had the non-believer known of all the Mercy that is in the Hands of God, he would not lose hope of entering Paradise. And had the believer known of all the punishment that is present with God, he would not consider himself safe from Hell-Fire.”
Sahih Al-Bukhari, Volume 8, Hadith 476