It wasnarrated from Umm Salamah from the Prophet (ﷺ) regarding:
"Andthat they will not disobey you in Ma'ruf (all that is good inIslam);" he said: "(It is about) wailing." (AR)
English reference (AR): Vol. 1, Book 6, Hadith 1579 (AR)
Arabic reference (AR): Book 6, Hadith 1646 (AR)