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]. (DE)
App reference (DE): Book 9, Hadith 223 (DE)
Arabic/English book reference (DE): Book 9, Hadith 1213 (DE)