Jarir bin 'Abdullah (May Allah be pleased with him) reported:
I pledged allegiance to the Prophet (ﷺ) to establish Salat, to pay the Zakat and to have the welfare of every Muslim at heart.[Al-Bukhari and Muslim]. (ES)
App reference (ES): Book 9, Hadith 223 (ES)
Arabic/English book reference (ES): Book 9, Hadith 1213 (ES)