Whose feet get covered with dust in Allah's Cause

وَقَوْلِ اللَّهِ تَعَالَى: {مَا كَانَ لأَهْلِ الْمَدِينَةِ} إِلَى قَوْلِهِ: {إِنَّ اللَّهَ لاَ يُضِيعُ أَجْرَ الْمُحْسِنِينَ}.And the Statement of Allah تعالى: “It was not becoming of the people of Al-Madina and the bedouins of the neighbourhood to remain behind Allah’s Messenger (Muhammad ﷺ) when fighting in Allah’s Cause… (up to)… Surely, Allah wastes not the reward of Al-Muhsinun (the doers of good)” (V.9:120).