Volume 6, Book 60, Number 139:
Narrated Abdullah:
We used to participate in the holy wars carried on by the Prophet and we had no women (wives)
with us. So we said (to the Prophet ). “Shall we castrate ourselves?” But the Prophet forbade us to do
that and thenceforth he allowed us to marry a woman (temporarily) by giving her even a garment,
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SAHIH BUKHARI VOLUME 6 > BOOK 60: PROPHETIC COMMENTARY ON THE QUR’AN (TAFSEER OF THE PROPHET (PBUH))
and then he recited: “O you who believe! Do not make unlawful the good things which Allah has
made lawful for you.”