عَنْ عُثْمَانَ بْنِ أَبِي الْعَاصِ رَضِيَ اللَّهُ عَنْهُ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ كَانَ لِدَاوُدَ نَبِيِّ اللَّهِ مِنَ اللَّيْلِ سَاعَةٌ يُوقِظُ فِيهَا أَهْلَهُ فَيَقُولُ يَا آلَ دَاوُدَ قُومُوا فَصَلُّوا فَإِنَّ هَذِهِ سَاعَةٌ يَسْتَجِيبُ اللَّهُ فِيهَا الدُّعَاءَ إِلَّا لِسَاحِرٍ وَعَشَّارٍ
Narrated by Sayyiduna ‘Uthman bin Abi al-‘As (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The Prophet of Allah, Dawud (peace be upon him), had fixed a time during the night in which he would wake up his family and say: O family of Dawud! Get up and pray, for this is an hour in which Allah accepts supplications, except for the supplication of a magician and a tax collector.