What to do when Mushaf is dropped or comes in contact with someones feet?

From what I have observed from childhood, when a Mushaf of the Holy Qur'an accidentally comes in contact with someone's feet or when it falls down, people usually pick the Qur'an/Mushaf up, touch it by their eyes and sometimes forehead, then kiss it and maybe ask for forgiveness in an audible voice and keep it in its place. When I asked this to scholars, scholars of different schools had different opinions. Some said: - Give sadaqah - Offer 1 raka'ah salaah (at the same place if you can) and ask for forgiveness. - kissing it was okay but some were against it None of them provided any reference to this ruling/action. What should one do if the Mushaf of the Holy Quran is accidentally dropped or comes in contact with someone's feet? *A strongly referenced answers would be much appreciated.*