ibn Abbas · Prayer at Night (Tahajjud)

When the Prophet (ﷺ) got up at night to offer the Tahajjud prayer, he used to say: Allahumma lakal-hamd. Anta qaiyyimus-samawati wal-ard wa man fihinna. Walakal-hamd, Laka mulkus-samawati wal-ard wa man fihinna. Walakal-hamd, anta nurus-samawati wal-ard. Wa lakal-hamd, anta-l-haq wa wa'duka-lhaq, wa liqa'uka Haq, wa qauluka Haq, wal-jannatu Han wan-naru Haq wannabiyuna Haq. Wa Muhammadun, sallal-lahu'alaihi wasallam, Haq, was-sa'atu Haq. Allahumma aslamtu Laka wabika amantu, wa 'Alaika tawakkaltu, wa ilaika anabtu wa bika khasamtu, wa ilaika hakamtu faghfir li ma…

The prayer of the Prophet (ﷺ) used to be of thirteen rak`at, i.e. of the night prayer.