Arcana Coelestia # 9203
9203. 'I will surely hear their cry' means that they are to receive help. This is clear without explanation.
Exodus 23:16
16
and the feast of harvest, the first-fruits of thy labours which thou hast sown in the field, and the feast of in-gathering, at the end of the year, when thou gatherest in thy labours out of the field.