Examples:

• Have you ever heard of the milk of human kindness?
• There were, however, some traces of the milk of human kindness.
• I don't have one ounce of the milk of human kindness in me.
• He gets cured, and I get to learn a valuable lesson about the milk of human kindness.
• Not one ounce of the milk of human kindness in the lot of them.
• We abandoned the milk of human kindness and turned our priorities elsewhere.