It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whoever says three times before the Fajr prayer on Friday: 'Astaghfirullah alladhi la ilaha illa huwa wa atubu ilayh' (I seek forgiveness from Allah, besides whom there is no god, and I turn to Him in repentance), his sins are forgiven, even if they are more than the foam of the sea."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Khusayf except Abd al-Aziz bin Abd al-Rahman."
Hadith Referenceالمعجم الأوسط / باب الميم / 7717
Hadith Gradingمحدثین:إسناده ضعيف جدًّا، فيه عبد العزيز بن عبد الرحمن البالسي
Hadith Takhrij«قال الهيثمي: وفيه عبد العزيز بن عبد الرحمن البالسي وهو ضعيف جدا «مجمع الزوائد ومنبع الفوائد، ج 2، ص 168»»