Musnad Ahmad 1153:235

Yahya narrated to us, Hisham narrated to us, my father informed me, from Aisha, from the Prophet, peace and blessings of Allah be upon him, who said: "Let not one of you say, 'My soul has become wicked' (khabuthat nafsi), but let him say, 'My soul has become troubled' (laqasat nafsi)."