Adab al-Mufrad

Benefits and Issues:
A person who affirms his words through his actions is called a "Siddiq" (truthful one). After prophethood, the rank of Siddiqiyyah (truthfulness) is the highest. In this hadith, the Siddiq referred to is Sayyiduna Abu Bakr as-Siddiq radi Allahu anhu, who cursed his slave, upon which the Prophet sallallahu alayhi wa sallam gave this admonition. It should be remembered that a Siddiq is not infallible (ma'soom), nor does cursing once or twice remove one from the rank of Siddiqiyyah, because the hadith explicitly states that whoever does this excessively is not worthy of being called a Siddiq. If, due to human weakness, the word of curse occasionally slips from the tongue, this is not contrary to Siddiqiyyah. Similarly, it is permissible to curse that person whom the Qur'an and Hadith have declared accursed.