Abdullah bin Shaddad bin al-Had (may Allah have mercy on him) narrates that Sayyiduna Abdullah (bin Mas'ud) (may Allah be pleased with him) was the one in charge of the pillow, the tooth-stick (siwak) and the sandals (of the Messenger of Allah (peace and blessings be upon him)).
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8419