Abdullah bin Umar reported,

The Messenger of Allah ﷺ said, "Islam is built upon five pillars: the testimony that there is no god but Allah and that Muhammad is the Messenger of Allah, establishing the prayer, giving the zakat, performing the pilgrimage, and fasting Ramadan."

Azami 31

Sahih

عن ابن عمر قال

قال رسول ﷺ: بني الإسلام على خمس: شهادة أن لا إله إلا الله وأن محمدا رسول الله، وإقام الصلاة، وإيتاء الزكاة، والحج، وصوم رمضان.

الأعظمي 31صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Faith
Chapter
Qualities of faith
Section
Asking about the pillars of Islam
Numbering
Jami al-Kamil 31 (2nd edition)
Azami 31