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.
malik:3-8Mālik > Balaghah > al-Muʾadhhin Jāʾ > ʿUmar b. al-Khaṭṭāb Yuʾdhinuh Liṣalāh al-Ṣubḥ Fawajadah Nāʾim > al-Ṣalāh Khayr Min al-Nawm Faʾamarah ʿUmar

Yahya related to me from Malik that he had heard that the muadhdhin came to Umar ibn al-Khattab to call him to the subh prayer and found him sleeping, so he said, "Prayer is better than sleep," and Umar ordered him to put that in the adhan for subh .  

مالك:٣-٨وَحَدَّثَنِي عَنْ مَالِكٍ أَنَّهُ بَلَغَهُ أَنَّ الْمُؤَذِّنَ جَاءَ إِلَى عُمَرَ بْنِ الْخَطَّابِ يُؤْذِنُهُ لِصَلاَةِ الصُّبْحِ فَوَجَدَهُ نَائِمًا فَقَالَ الصَّلاَةُ خَيْرٌ مِنَ النَّوْمِ فَأَمَرَهُ عُمَرُ

أَنْ يَجْعَلَهَا فِي نِدَاءِ الصُّبْحِ