Hadith on Islam: Whoever practices the Pillars of Islam, without adding or subtracting from them, will enter Paradise

Abu Huraira reported: An Arab bedouin came to the Messenger of Allah and said, “O Messenger of Allah, tell me about a deed if I did I would enter Paradise.” The Messenger of Allah صلى الله عليه وسلم said, “Worship Allah and associate nothing with Him, establish the prescribed prayers, give the obligatory charity, and fast the month of Ramadan.” The man said, “By him in whose hand is my soul, I will not add and subtract anything from this.” When the Prophet heard this, he  said, “Whoever would like to look at a man from Paradise, then look at him.”

[Sahih Muslim, Book 1, Number 14]

Book of Faith, Chapter: Faith by which a person will enter Paradise

عَنْ أَبِي هُرَيْرَةَ  أَنَّ أَعْرَابِيًّا جَاءَ إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ يَا رَسُولَ اللَّهِ دُلَّنِي عَلَى عَمَلٍ إِذَا عَمِلْتُهُ دَخَلْتُ الْجَنَّةَ قَالَ تَعْبُدُ اللَّهَ لَا تُشْرِكُ بِهِ شَيْئًا وَتُقِيمُ الصَّلَاةَ الْمَكْتُوبَةَ وَتُؤَدِّي الزَّكَاةَ الْمَفْرُوضَةَ وَتَصُومُ رَمَضَانَ قَالَ وَالَّذِي نَفْسِي بِيَدِهِ لَا أَزِيدُ عَلَى هَذَا شَيْئًا أَبَدًا وَلَا أَنْقُصُ مِنْهُ فَلَمَّا وَلَّى قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ سَرَّهُ أَنْ يَنْظُرَ إِلَى رَجُلٍ مِنْ أَهْلِ الْجَنَّةِ فَلْيَنْظُرْ إِلَى هَذَا

صحيح مسلم كتاب الإيمان باب بيان الإيمان الذي يدخل به الجنة وأن من تمسك بما أمر به دخل الجنة