Abu Basīr asked Abu Abdillah (a.s.):“Why has Allah given miracles to His prophet and His messenger and to you?” He said (a.s.): “That it may be an evidence of the truthfulness of the one who caused it, and the miracle is a sign from Allah, which He gives to no one but His prophets, His messengers, and His proofs, that the truthfulness of the truthful may be recognized from the lie of the liar.” [Ilal-ush-Shara’i of As-Saduq, Volume 1, Chapter 100, Hadith 1]

حدثنا علي بن احمد قال حدثنا محمد بن أبى عبد الله عن موسى بن عمران عن عمه، عن علي بن أبى حمزة، عن أبى بصير قال: قلت لابي عبد الله “ ع “ لاي علة اعطى الله عزوجل أنبيائه ورسله وأعطاكم المعجزة؟ فقال: ليكون دليلا على صدق من أتى به والمعجزة علامة لله لا يعطيها إلا أنبيائه ورسله وحججه ليعرف به صدق الصادق من كذب الكاذب.