Canonical version
One day ‘Abdu’l-Bahá learned that a lady had cut her lovely hair in
One day ‘Abdu’l-Bahá learned that a lady had cut her lovely hair in order to contribute to the building of the House of Worship in Wilmette. He wrote to her with loving appreciation: ‘On the one hand, I was deeply touched, for thou hadst sheared off those fair tresses of thine with the shears of detachment from this world and of self-sacrifice in the path of the Kingdom of God. And on the other, I was greatly pleased, for that dearly-beloved daughter hath evinced so great a spirit of self-sacrifice as to offer up so precious a part of her body in the pathway of the Cause of God. Hadst thou sought my opinion, I would in no wise have consented that thou shouldst shear off even a single thread of thy comely and wavy locks; nay, I myself would have contributed in thy name for the Mashriqu’l-Adhkar. This deed of thine is, however, an eloquent testimony to thy noble spirit of self-sacrifice.’
Source: Honnold, Annamarie, Vignettes from the Life of ‘Abdu’l-Bahá, p. 113
Collected from bahaistories.com (Subject: moderation).