Hadith 1738
It is narrated on the authority of Abu Sa'id that the Messenger of Allah (ﷺ) said: On the Day of Judgment there will be a flag for every person guilty of the breach of faith. It will be raised in proportion to the extent of his guilt; and there is no guilt of treachery more serious than the one committed by the ruler of men.
Hadith 2252
Abu Sa'id Khudri reported that Allah's Messenger (ﷺ) made a mention of a woman of Bana Isra'il who had filled her ring with musk and musk is the most fragrant of the scents.