Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: "One Friday becomes an expiation for the sins committed between it and the next Friday, as long as major sins are not committed."

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The five prayers and Friday (prayer) to the next Friday are an expiation for all the sins committed in between them, as long as major sins are not committed, and (Friday) also becomes an expiation for the sins committed in the next three days."

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The five prayers, and from one Friday to the next Friday, and from one Ramadan to the next Ramadan, are expiation for all the sins committed in between them, so long as major sins are avoided."