6 With what shall I come before the LORD
and bow down before the exalted God?
Shall I come before him with burnt offerings,
with calves a year old?
7 Will the LORD be pleased with thousands of rams,
with ten thousand rivers of oil?
Shall I offer my firstborn for my transgression,
the fruit of my body for the sin of my soul?
8 He has showed you, O man, what is good.
And what does the LORD require of you?
To act justly and to love mercy
and to walk humbly with your God.
The Hebrew words "Laasot Mishpat" are translated above as "to act justly". (This JPS translation offers "to do justice"). There are different words for rules in the Torah (e.g. chok, mishpat, torah) , so the word mishpat isn't so easy to translate. It seems, however, to be closely linked to laws that are concerned with justice.
Parshat Mishaptim (Exodus 21:2 -23:33) seems to support this, as we are given a list of laws that overwhelmingly are concerned with justice between people. It should be noted, as and side, that there are other laws in this Torah portion that don't seem primarily to concern justice, such as the celebration of festivals which thank God for acting in history for Israel.