Deuteronomy Rabbah 5:3

It is written, "To do righteousness and justice is more acceptable to God than sacrifice." (Proverbs 21:3). Scripture does not say, 'as much as sacrifice', but ’more than sacrifice’. How? Sacrifices were operative only so long as the Temple stood, but acts of justice were done during the time when the Temple stood and also now when the Temple is no longer. Another explanation: Sacrifices atone only for sins committed unwittingly, but acts of justice atone for sins committed unwittingly and intentionally. Another explanation: Sacrifices are practiced only by those below [i.e. humans], but acts of justice by those on high [angels] and by those below.’ Another explanation: Sacrifices are operative only in this world, but acts of justice are operative both in this world and in the world to come. [AJWS translation]