ذِكْرُ الْأَمْرِ لِلدَّاخِلِ الْمَسْجِدَ أَنْ يَرْكَعَ رَكْعَتَيْنِ
The Apostle of Allah ﷺ owed me a debt; he paid me back and made an addition (of this). I entered the mosque and he (the Holy Prophet) said to me: Observe two rak'ahs of prayer. (Using translation from Muslim 715a)
كَانَ لِي دَيْنٌ عَلَى النَّبِيِّ ﷺ فَقَضَانِي وَزَادَنِي فَدَخَلْتُ عَلَيْهِ الْمَسْجِدَ فَقَالَ لِي «صَلِّ رَكْعَتَيْنِ»