The proposal, which would also have raised the legal age of marriages for females from 16 to 18, called for "rigorous" punishment up to two years in prison for those who organise child marriages, still common in some parts of Pakistan.
Marvi Memon, a member of the ruling Pakistan Muslim League (Nawaz), had moved to amend existing child marriage legislation in the lower house but was forced to withdraw her bid after it was rejected by a parliamentary committee on religious affairs, a source familiar with the development told AFP.
The CII was formed in 1962 to advise parliament on the compatibility of laws with Sharia.
Its recommendations are non-binding, and it has drawn widespread criticism in the past for other rulings -- including in 2013, when it suggested making DNA inadmissible evidence in rape cases, instead calling for the revival of an Islamic law that makes it mandatory for a survivor to provide four witnesses to back their claims.
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"Marvi also wanted the age for girls' marriage to be raised from 16 years to 18 years, which does not in any way violate the teachings of Islam," the source said.
The original law stipulates the age of marriage at 16 for women and 18 for men but Pakistani religious scholars believe it is not in accordance with Islamic teachings.
Rights activists strongly criticised the rejection of bill.
"It is a pity that the committee came under the pressure of the council's unjust ruling," leading rights activist I.A. Rehman told AFP.