Read the Qur’an, as it will come as an intercessor for its companions on the Day of Resurrection. [Muslim]
«اقْرَؤُوا القرْآنَ؛ فَإنَّهُ يَأتِي يَوْمَ القِيَامَةِ شَفِيعًا لأَصْحَابِهِ». [مسلم]