It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him): I saw the men with their waist-wrappers tied around their necks like children, because their waist-wrappers were small, praying behind the Messenger of Allah (peace and blessings be upon him). Someone said: O assembly of women! Do not raise your heads until the men have sat up straight.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3301