In the Name of Allah, the Most Beneficent, the Most Merciful
Hadith 71:
Imam Ali (a): By God, this world of yours is more contemptible in my eyes than a [chewed-up] bone of a pig in the hand of a leper.
Nahj al-Balagha Maxim 236. Also refer to Sermon 3 (known as al-Shiqshiqiyya) for another similar statement.