Abu Hurairah (May Allah be pleased with him) reported:
The Prophet (ﷺ) said, "Do not choose the Friday night among all other nights for standing in (Tahajjud) prayer, and do not choose Friday among all other days for Saum (fasting) except that one you have accustomed to."[Muslim].
App reference: Book 18, Hadith 250
Arabic/English book reference: Book 18, Hadith 1760