Two are the prayers which the Messenger of Allah ﷺ always observed in my house-openly or secretly-two rak'ahs before the dawn and two rak'ahs after the 'Asr. (Using translation from Muslim 835c)
«صَلَاتَانِ مَا تَرَكَهُمَا رَسُولُ اللهِ ﷺ فِي بَيْتِي سِرًّا وَلَا عَلَانِيَةً رَكْعَتَانِ قَبْلَ الْفَجْرِ وَرَكْعَتَانِ بَعْدَ الْعَصْرِ»