Prophet (SAW)'s Prayers

To soothe ill children
أُعِيذُكَ بِكَلِمَاتِ اللَّهِ التَّامَّةِ مِنْ كُلِّ شَيْطَانٍ وَهَامَّةٍ وَمِنْ كُلِّ عَيْنٍ لَامَّةٍ
To soothe children during illness or at any harm recite:
"I seek refuge in Allah with His total words from the evil Satan, from every poisonous animal and from the evil eye". (Bukhari)
If any member of Prophet Mohammad (SAW.)'s household fell ill, he used to recite the the four Quls and blow on them.