Riyad us Saliheen: Hadith 1210

A man said to the Prophet (ﷺ): "Direct me to a deed which may admit me to Jannah." Upon this he (the Messenger of Allah (ﷺ)) said, "Worship Allah and never associate anything with Him in worship, establish Salat, pay Zakat, and strengthen the ties of kinship."

[Al-Bukhari and Muslim].