Amr bin Salim says that I bear witness that Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) bore witness regarding the Messenger of Allah (peace and blessings be upon him) that he (peace be upon him) said: "It is obligatory upon every adult person to perform ghusl (ritual bath) on the day of Jumu'ah, and that he should use the miswak, and if he has perfume available, he should apply it." Amr says: As for ghusl, I bear witness that it is obligatory, but regarding the use of miswak, I do not know whether it is obligatory or not, but our respected teacher narrated it to us in this manner.