Jami` at-Tirmidhi 357
جامع الترمذي#357Da'ifThawban narrated that :the Prophet said: "It is not allowed for a man to look into the interior of a man's house until he has been given permission, for if he looks, then he has entered. And one who leads people (in Salat) should not supplicate for himself alone with the exclusion of his congregation. If he does, then he has betrayed them. And one is not to stand for Salat while he has to urinate
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirDaif
Al-AlbaniDaif
Bashar Awad MaaroufHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 2:209