When visiting someone who is ill, one of the etiquettes is that we should offer them words of encouragement and make duaa for them. We say words such as "don't worry it's purification insha'Allah" I.e. it is purification from sin and raising in rank. These words provide a lot of encouragement for the suffering person on the condition they believe in Allâh because it reminds them of the akhira and it reminds them about patience. May Allâh cure all those who are suffering. via Brother Abu Ibraheem