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حَدَّثَنِي هَنَّادُ بْنُ السَّرِيِّ، حَدَّثَنَا أَبُو الأَحْوَصِ، عَنْ أَشْعَثَ، عَنْ أَبِيهِ، عَنْ مَسْرُوقٍ، قَالَ سَأَلْتُ عَائِشَةَ عَنْ عَمَلِ، رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَتْ كَانَ يُحِبُّ الدَّائِمَ . قَالَ قُلْتُ أَىَّ حِينٍ كَانَ يُصَلِّي فَقَالَتْ كَانَ إِذَا سَمِعَ الصَّارِخَ قَامَ فَصَلَّى .
Masruq is reported to have asked ‘A’isha about the action (most pleasing to) the Messenger of Allah (ﷺ). She said:
He (the Holy Prophet) loved (that action) which one keeps on doing regularly. I said (to ‘A’isha): When did he pray (at night)? She replied: When he heard the cock crow, he got up and observed prayer.
USC-MSA web (English) reference