Narrated from A'ishah radi Allahu anha, "When the Prophet sal Allahu alayhi wa sallam saw something that pleased him, he would say: Alhamdulillahil lathee bi ni'matihi tatimmus saalihaat, and when he saw something that displeased him, he would say: Alhamdulillah 'alaa kuli haal.(Narrated in Sunan Ibn Maajah, classified as Saheeh according to Shaykh Albaani rahimahullah in Silsilatus Saheehah hadeeth 265)