Jabir ibn ‘Abdullah said, “The Messenger of Allah, may Allah bless him and grant him peace, made supplication in this mosque, the Mosque of Victory, on Monday, Tuesday and Wednesday, and it was answered for him between the two prayers on Wednesday,” Jabir said, “Whenever anything severe and serious happened to me and I singled out that time and made supplication to Allah concerning it between the two prayers on Wednesday, I found the answer.'” Musnad Ahmad

عَنْ عَبْدِ الرَّحْمَنِ بْنِ كَعْبٍ قَالَ‏:‏ سَمِعْتُ جَابِرَ بْنَ عَبْدِ اللهِ يَقُولُ‏:‏ دَعَا رَسُولُ اللهِ صلى الله عليه وسلم فِي هَذَا الْمَسْجِدِ، مَسْجِدِ الْفَتْحِ، يَوْمَ الِاثْنَيْنِ وَيَوْمَ الثُّلاَثَاءِ وَيَوْمَ الأَرْبِعَاءِ، فَاسْتُجِيبَ لَهُ بَيْنَ الصَّلاَتَيْنِ مِنْ يَوْمِ الأَرْبِعَاءِ قَالَ جَابِرٌ‏:‏ وَلَمْ يَنْزِلْ بِي أَمْرٌ مُهِمٌّ غائِظٌ إِلاَّ تَوَخَّيْتُ تِلْكَ السَّاعَةَ، فَدَعَوْتُ اللَّهَ فِيهِ بَيْنَ الصَّلاَتَيْنِ يَوْمَ الأَرْبِعَاءِ فِي تِلْكَ السَّاعَةِ، إِلا عَرَفْتُ الإجَابَةَ‏.” (صحيح الترغيب)‏