Sunan an-Nasa'i 468
It was narrated from Abu Ayyub that a man said:
"O Messenger of Allah, tell me of a deed that will gain me admittance to Paradise." The Messenger of Allah (ﷺ) said: "Worship Allah and do not associate anything with Him, establish the Salah, pay the Zakah and uphold the ties of kinship. Let go!" - as if he was riding his camel. [1]

[1] As if he was riding his camel and the man had grabbed hold of its reins to ask this question.
أَخْبَرَنَا مُحَمَّدُ بْنُ عُثْمَانَ بْنِ أَبِي صَفْوَانَ الثَّقَفِيُّ، قَالَ حَدَّثَنَا بَهْزُ بْنُ أَسَدٍ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ عُثْمَانَ بْنِ عَبْدِ اللَّهِ، وَأَبُوهُ، عُثْمَانُ بْنُ عَبْدِ اللَّهِ أَنَّهُمَا سَمِعَا مُوسَى بْنَ طَلْحَةَ، يُحَدِّثُ عَنْ أَبِي أَيُّوبَ، أَنَّ رَجُلاً، قَالَ يَا رَسُولَ اللَّهِ أَخْبِرْنِي بِعَمَلٍ يُدْخِلُنِي الْجَنَّةَ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ تَعْبُدُ اللَّهَ وَلاَ تُشْرِكُ بِهِ شَيْئًا وَتُقِيمُ الصَّلاَةَ وَتُؤْتِي الزَّكَاةَ وَتَصِلُ الرَّحِمَ ذَرْهَا ‏"‏ كَأَنَّهُ كَانَ عَلَى رَاحِلَتِهِ ‏.‏