Marriage

And when He desired to manifest grace and beneficence to men, and to set the world in order, He revealed observances and created laws; among them He established the law of marriage, made it as a fortress for well-being and salvation, and enjoined it upon us in that which was sent down out of the heaven of sanctity in His Most Holy Book.

Bahá’u’lláh, Bahá’í Prayers, p. 104

It is unlawful to become engaged to a girl before she reaches the age of maturity.

Bahá’u’lláh, Synopsis and Codification of the Kitab-i-Aqdas, p. 39

Marriage is conditioned on the consent of both parties and their parents, whether the woman be a maiden or not.

Bahá’u’lláh, The Kitab-i-Aqdas, p. 149

Marriage is conditioned upon both parties having attained the age of maturity which is fixed at 15.

Bahá’u’lláh, Synopsis and Codification of the Kitab-i-Aqdas, p. 39

QUESTION: In a treatise in Persian on various questions, the age of maturity hath been set at fifteen; is marriage likewise conditional upon the reaching of maturity, or is it permissible before that time? ANSWER: Since the consent of both parties is required in the Book of God, and since, before maturity, their consent or lack of it cannot be ascertained, marriage is therefore conditional upon reaching the age of maturity, and is not permissible before that time.

Bahá’u’lláh, The Kitab-i-Aqdas, p. 133

As for the question regarding marriage under the Law of God: first thou must choose one who is pleasing to thee, and then the matter is subject to the consent of father and mother. Before thou makest thy choice, they have no right to interfere.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 118