Amos 2:6
Thus said the LORD; For three transgressions of Israel, and for four, I will not turn away the punishment thereof; because they sold the righteous for silver, and the poor for a pair of shoes;
Torrey's Topical Textbook—AKJV

Amos 8:6
That we may buy the poor for silver, and the needy for a pair of shoes; yes, and sell the refuse of the wheat?
Torrey's Topical Textbook—AKJV