To give the Bai'ah (pledge) for Iqamat-as-Salat [the offering of As-Salat (the prayers). Sahih al-Bukhari 524
Arabic hadith text
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنَا قَيْسٌ، عَنْ جَرِيرِ بْنِ عَبْدِ اللَّهِ، قَالَبَايَعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم عَلَى إِقَامِ الصَّلاَةِ، وَإِيتَاءِ الزَّكَاةِ، وَالنُّصْحِ لِكُلِّ مُسْلِمٍ.
Translation
Narrated Jarir bin `Abdullah
I gave the pledge of allegiance to Allah's Messenger (ﷺ) for to offer prayers perfectly, to pay Zakat regularly, and to give good advice to every Muslim.