An optional in-plan provision allowing one self-certified emergency withdrawal up to $1,000 per calendar year from your retirement account (401(k), 403(b), without the 10% early-withdrawal penalty.
Request this in your participant account under "Account>Request a Distribution". This is penalty free (income taxes still apply), with no required documentation (self certify is required).
There is a repayment option. You can repay the amount within three years. If not paid you must wait three years before taking another withdrawal. You can do this by adding your personal bank account under "Account>Bank Account".
Only one $1,000 withdrawal per year is allowed.