Sunan Ibn Majah The Book of Purification and its Sunnah Ahmed bin 'Ubda bin Musa أحمد بن عبدة بن موسى Amir al-Sha'bi عامر الشعبي Hammad bin Zayd حماد بن زيد بن درهم الأزدي الأزرق Mujalid bin Sa'id bin 'Umayr مجالد بن سعيد الهمداني Qarza bin Ka'b bin Tha'laba “We were given a time limit with regard to trimming the mustache, shaving the pubic hairs, plucking the armpit hairs and clipping the nails. We were not to leave that for more than forty days.” https://parallelquran.com/hadith/sunan-ibn-majah-29/