'RShimon ben Elazar says: Do not appease your friend at the time of his anger, do not comfort him at the time that his dead lies before him, do not question him at the time of his vow, and do not attempt to see him at the time of his degradation.

Shmuel HaKatan says: “When your foe falls, be not glad, and when he stumbles, let your heart not be joyous, lest Hashem see and it be displeasing in His eyes, and He return His anger from him.”