Sahih Adab al-Mufrad

It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings of Allah be upon him) made supplication in this mosque, "Masjid al-Fath," on Monday, Tuesday, and Wednesday. His supplication was accepted on Wednesday between the two prayers. Sayyiduna Jabir (may Allah be pleased with him) says: Whenever any distressing matter befell me that would make me angry, I would seek out that very hour. I would supplicate to Allah at that hour between the two prayers on Wednesday, and I would come to know of the acceptance of the supplication. Whenever any important task or matter came before me, I would specify that time and supplicate between the two prayers on Wednesday, and I saw that the supplication was accepted.