Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
abudawud:768Muḥammad b. Rāfiʿ > Abū Nūḥ Qurād > ʿIkrimah Biʾisnādih Bilā Ikhbār And Maʿnāh

When he stood up, he said the takbir (Allah is most great) and said. . . .  

أبو داود:٧٦٨حَدَّثَنَا مُحَمَّدُ بْنُ رَافِعٍ حَدَّثَنَا أَبُو نُوحٍ قُرَادٌ حَدَّثَنَا عِكْرِمَةُ بِإِسْنَادِهِ بِلاَ إِخْبَارٍ وَمَعْنَاهُ قَالَ

كَانَ إِذَا قَامَ بِاللَّيْلِ كَبَّرَ وَيَقُولُ