Do not hate each other; do not envy each other; do not desert each other; and be the servants of Allah as brethren. It is not allowed for a Muslim to keep apart from his brother for more than three days.
Sunan Abi Dawud Book 43, Hadith 138
← Previous Hadith Something of her was stolen, and she began to curse him (i.e. the thief). The Messenger of Allah (ﷺ) said to her: Do not lessen his sin.

Sunan Abi Dawud Book 43, Hadith 137 Next Hadith → it is not allowable for a Muslim to keep apart from his brother for more than three days. When they meet, this turns away from him, and that turns away from him. The better of the two is the one who initiates in salutation.

Sunan Abi Dawud Book 43, Hadith 139