Tahajjud, wanda aka fi sani da "sallar dare", sallar son rai ce da mabiya addinin Islama ke yi. Ba ɗaya daga cikin sallolin farilla guda biyar da ake buƙata ga duk musulmai ba, kodayake annabin musulunci, an rubuta Muhammadu yana yin sallar tahajjud a kai a kai yana kuma ƙarfafa sahabbansa. A cikin Fiqhu As-Sunnah, Sheikh Sayyid Sabiq ya yi karin bayani kan batun Tahajjud kamar haka: Kuma a wani bangare na dare, ka kasance a farke da sallah. Ya wuce abin da ya hau kan ku; watakila Ubangiji] zai ɗaga ka zuwa matsayi mai girma. — Alqur'ani 17:79 Kuma wadanda suke kwana suna masu sujada ga Ubangijinsu da tsayuwa. — Alqur'ani 25:64 Bayan waɗannan ayoyin Alƙur'ani, akwai kuma hadisai masu yawa (waɗanda aka ruwaito da tabbatattu daga Muhammad) waɗanda ke ƙarfafa mahimmancin Sallar Tahajjud. A cikin hadisai daban -daban, an ambace shi da Qiyamul Layl (tsayuwar dare), Salatul Layl (sallar dare) da Tahajjud. Yin tahajjud yana nuna aikin tashi daga bacci cikin dare sannan yayi sallah.