(68) بَابُ هَلْ يَبِيعُ حَاضِرٌ لِبَادٍ بِغَيْرِ أَجْرٍ وَهَلْ يُعِينُهُ أَوْ يَنْصَحُهُ
Narrated Jarir:
I have given a pledge of allegiance to Allah's Messenger (ﷺ) for to testify that None has the right to be worshipped but Allah, and Muhammad is His Apostle, to offer prayers perfectly, to pay Zakat, to listen to and obey (Allah's and His Prophet's orders), and to give good advice to every Muslim.
Reference: Sahih al-Bukhari 2157
In-book reference: Book 34, Hadith 108
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 34, Hadith 366