The Prophet ﷺ said, "O Allah, I declare it a grave sin to violate the rights of the two weak ones, the orphan and the woman."
حدثنا يحيى عن ابن عجلان قال حدثني سعيد
عن النبي ﷺ قال اللهم إني أحرج حق الضعيفين اليتيم والمرأة
Its chain of transmission is sahih. Ibn Majah reported it, 2/1213, no. 3678, in the Book of Manners, the chapter on the right of the orphan, and Busiri declared it sahih in Zawaid, and Hakim declared it sahih, 1/63, and Dhahabi agreed with him.As for his saying, "I make forbidden the rights of the two weak ones," it means, I place in that a restriction and a constraint.