Sirach 2:13

13 Woe unto him that is fainthearted! for he believeth not; therefore shall he not be defended.

Sirach 2:13 In-Context

11 For the Lord is full of compassion and mercy, longsuffering, and very pitiful, and forgiveth sins, and saveth in time of affliction.
12 Woe be to fearful hearts, and faint hands, and the sinner that goeth two ways!
13 Woe unto him that is fainthearted! for he believeth not; therefore shall he not be defended.
14 Woe unto you that have lost patience! and what will ye do when the Lord shall visit you?
15 They that fear the Lord will not disobey his Word; and they that love him will keep his ways.

The Brenton translation of the Septuagint is in the public domain.