Do not harden one’s heart nor shut one’s hand towards a poor Jew
“You shall not harden your heart nor shut your hand from your needy brother” Devarim 15:7
This applies in all places at all times for men and women.
“Anyone who gives a poor person even a small coin receives 6 blessing. One who comforts with kind words is blessed with 11 blessings” Talmud-Bava Basra 9b