Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: One prostration of these people (i.e. the imams of the present time) is longer than three of the prostrations of the Prophet (peace and blessings be upon him).
Ahmad and al-Tabarani in al-Mu'jam al-Kabir recorded it, and its chain is hasan (good).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2365