Doing the obligatory deeds leads to Jannah

عَنْ أَبِي عَبْدِ اللَّهِ جَابِرِ بْنِ عَبْدِ اللَّهِ الْأَنْصَارِيِّ رَضِيَ اللَّهُ عَنْهُمَا: أَنَّ رَجُلًا سَأَلَ رَسُولَ اللَّهِ صلى الله عليه و سلم فَقَالَ: أَرَأَيْت إذَا صَلَّيْت الْمَكْتُوبَاتِ، وَصُمْت رَمَضَانَ، وَأَحْلَلْت الْحَلَالَ، وَحَرَّمْت الْحَرَامَ، وَلَمْ أَزِدْ عَلَى ذَلِكَ شَيْئًا؛ أَأَدْخُلُ الْجَنَّةَ؟ قَالَ: نَعَمْ . [رَوَاهُ مُسْلِمٌ]

On the authority of Abu Abdullah Jabir bin Abdullah al-Ansaree (may Allah be pleased with him) that: A man questioned the Messenger of Allah (peace and blessings of Allah be upon him) and said, “Do you think that if I perform the obligatory prayers, fast in Ramadhan, treat as lawful that which is halal, and treat as forbidden that which is haram, and do not increase upon that [in voluntary good deeds], then I shall enter Paradise?” He (peace and blessings of Allah be upon him) replied, “Yes.” [Muslim]

وَحَدَّثَنِي سَلَمَةُ بْنُ شَبِيبٍ، حَدَّثَنَا الْحَسَنُ بْنُ أَعْيَنَ، حَدَّثَنَا مَعْقِلٌ، - وَهُوَ ابْنُ عُبَيْدِ اللَّهِ - عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، أَنَّ رَجُلاً، سَأَلَ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ أَرَأَيْتَ إِذَا صَلَّيْتُ الصَّلَوَاتِ الْمَكْتُوبَاتِ وَصُمْتُ رَمَضَانَ وَأَحْلَلْتُ الْحَلاَلَ وَحَرَّمْتُ الْحَرَامَ وَلَمْ أَزِدْ عَلَى ذَلِكَ شَيْئًا أَأَدْخُلُ الْجَنَّةَ قَالَ ‏ "‏ نَعَمْ ‏"‏ ‏.‏ قَالَ وَاللَّهِ لاَ أَزِيدُ عَلَى ذَلِكَ شَيْئًا ‏.‏

It is narrated on the authority of Jabir that a man once said to the Messenger of Allah (ﷺ):Shall I enter Paradise in case I say the obligatory prayers, observe the (fasts) of Ramadan and treat that as lawful which has been made permissible (by the Shari'ah) and deny myself that what is forbidden, and make no addition to it? He (the Holy Prophet) replied in the affirmative. He (the inquirer) said: By Allah, I would add nothing to it