Al-Kāfi - Volume 1 > Setting-up a Time Limit for the Reappearance of the Twelfth Imam (a.s.) an Antipathetic Issue
Hadith #5

5ـ الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ مُعَلَّى بْنِ مُحَمَّدٍ عَنِ الْحَسَنِ بْنِ عَلِيٍّ الْخَزَّازِ عَنْ عَبْدِ الْكَرِيمِ بْنِ عَمْرٍو الْخَثْعَمِيِّ عَنِ الْفُضَيْلِ بْنِ يَسَارٍ عَنْ ابي جعفر (عَلَيْهِ السَّلام) قَالَ قُلْتُ لِهَذَا الامْرِ وَقْتٌ فَقَالَ كَذَبَ الْوَقَّاتُونَ كَذَبَ الْوَقَّاتُونَ كَذَبَ الْوَقَّاتُونَ إِنَّ مُوسَى (عَلَيْهِ السَّلام) لَمَّا خَرَجَ وَافِداً إِلَى رَبِّهِ وَاعَدَهُمْ ثَلاثِينَ يَوْماً فَلَمَّا زَادَهُ الله عَلَى الثَّلاثِينَ عَشْراً قَالَ قَوْمُهُ قَدْ أَخْلَفَنَا مُوسَى فَصَنَعُوا مَا صَنَعُوا فَإِذَا حَدَّثْنَاكُمُ الْحَدِيثَ فَجَاءَ عَلَى مَا حَدَّثْنَاكُمْ بِهِ فَقُولُوا صَدَقَ الله وَإِذَا حَدَّثْنَاكُمُ الْحَدِيثَ فَجَاءَ عَلَى خِلافِ مَا حَدَّثْنَاكُمْ بِهِ فَقُولُوا صَدَقَ الله تُؤْجَرُوا مَرَّتَيْنِ.

5. Al-Husayn ibn mmd has narrated from Mu‘alla ibn Muhammad from al-Hassan ibn Ali al-Khazzaz from ‘Abd al-Karim ibn ‘Umar al-Khath‘ami from al-Fadl ibn Yasar who has said the following. “I asked abu Ja’far (a.s.), ‘Is there a definite time for this matter (the rise of al-Mahdi with Divine Authority)?” He said, “Those who set a definite time have lied, those who set a definite time have lied, those who set a definite time have lied. When Musa (Moses) came out to delegate before his lord and gave the people a definite time for his return and Allah added an other ten days his people said, ‘He has broken his promise.’” They then did what they did. When we say a hadith (make a statement to you) and if our hadith comes true you should say, “Allah has spoken the truth.” If we say a hadith to you ( make a statement) and if doe not come true, you should say, “Allah has spoken the truth.” You will be rewarded twice.”