The Prophet ﷺ said: When a man comes to visit a sick person, he should say: O Allah, cure Thy servant, who may then wreak havoc on an enemy for your sake, or walk at a funeral for your sake. Abu Dawud said: Ibn As-Sarh (one of the narrators) said: "Ilas-salat (To the Salat)".
قَالَ النَّبِيُّ ﷺ إِذَا جَاءَ الرَّجُلُ يَعُودُ مَرِيضًا فَلْيَقُلِ اللَّهُمَّ اشْفِ عَبْدَكَ يَنْكَأُ لَكَ عَدُوًّا أَوْ يَمْشِي لَكَ إِلَى جَنَازَةٍ