Raytah, who was the umm walad (a slave woman who bore her master a child) of Sayyiduna Anas bin Malik (may Allah be pleased with him), narrated that Sayyiduna Anas bin Malik (may Allah be pleased with him) disliked taking a ritual bath (ghusl) at midday and at the time of Isha.
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 698