Signs of the Reappearance of Al-Qaim عليه السلام
Kamāl al-Dīn wa Tamām al-Niʿma|Volume 1|Book 2|Chapter 54
6- وَ بِهَذَا الْإِسْنَادِ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ حَمَّادِ بْنِ عِيسَى عَنْ إِبْرَاهِيمَ بْنِ عُمَرَ عَنْ أَبِي أَيُّوبَ عَنِ الْحَارِثِ بْنِ الْمُغِيرَةِ عَنْ أَبِي عَبْدِ اللَّهِ ع قَالَ: الصَّيْحَةُ الَّتِي فِي شَهْرِ رَمَضَانَ تَكُونُ لَيْلَةَ الْجُمُعَةِ لِثَلَاثٍ وَ عِشْرِينَ مَضَيْنَ مِنْ شَهْرِ رَمَضَانَ.
6 - And through the same chain of narrators from Husain bin Saeed from Hammad bin Isa from Ibrahim bin Umar from Abi Ayyub from Harith bin Mughaira from Abi Abdullah عليه السلام that he said:
“The call from the sky shall be raised on the 23rd night of the month of Ramadhan.”