Messenger of Allah ﷺ returned from the Ghazwa of Tabuk, and when he approached Medina, he said, "There are some people in Medina who were with you all the time, you did not travel any portion of the journey nor crossed any valley, but they were with you they (i.e. the people) said, "O Messenger of Allah ﷺ! Even though they were at Medina?" He said, "Yes, because they were stopped by a genuine excuse."  

أَنَّ رَسُولَ اللَّهِ ﷺ رَجَعَ مِنْ غَزْوَةِ تَبُوكَ فَدَنَا مِنَ الْمَدِينَةِ فَقَالَ إِنَّ بِالْمَدِينَةِ أَقْوَامًا مَا سِرْتُمْ مَسِيرًا وَلاَ قَطَعْتُمْ وَادِيًا إِلاَّ كَانُوا مَعَكُمْ قَالُوا يَا رَسُولَ اللَّهِ وَهُمْ بِالْمَدِينَةِ قَالَ وَهُمْ بِالْمَدِينَةِ حَبَسَهُمُ الْعُذْرُ  

We were with the Prophet ﷺ on an expedition. He said: There are some people in Medina. They are with you whenever you cover a distance or cross a valley. They have been detained by illness.  

كُنَّا مَعَ النَّبِيِّ ﷺ فِي غَزَاةٍ فَقَالَ: «إِنَّ بِالْمَدِينَةِ لَرِجَالاً مَا سِرْتُمْ مَسِيرًا وَلاَ قَطَعْتُمْ وَادِيًا إِلاَّ كَانُوا مَعَكُمْ۔ حَبَسَهُمُ الْمَرَضُ۔»