Leviticus/Vayikra 19:13
יג לֹא-תַעֲשֹׁק אֶת-רֵעֲךָ, וְלֹא תִגְזֹל; לֹא-תָלִין פְּעֻלַּת שָׂכִיר, אִתְּךָ--עַד-בֹּקֶר.
13 Do not oppress your neighbor and do not rob him. Do not keep the wages of the worker with you until morning.
As cited in Rabbi Jill Jacobs, There Shall Be No Needy: Pursuing Social Justice through Jewish Law & Tradition (Woodstock, VT: Jewish Lights Publishing, 2010), 99.