Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Anas bin Malik, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: "Foul language, obscene speech, severing of ties of kinship, considering the treacherous as trustworthy and the trustworthy as treacherous are among the signs of the Hour."