Sayyiduna Ibn Abbas (may Allah be pleased with them both) said that the Prophet (peace and blessings be upon him) said: "Circumcision is a sunnah for men and an honour for women."
This chain is da'if (weak), and the preserved version is mawquf (a saying of the Companion).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الأشربة والحد فيها / 17565