It is narrated from Sayyiduna Uthman bin Abi al-As al-Thaqafi (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "At midnight the gates of the heaven are opened, then a caller calls out: 'Is there anyone supplicating, so that his supplication may be answered? Is there anyone asking, so that he may be given? Is there anyone in distress, so that his distress may be relieved?' So every Muslim who makes a supplication, Allah, the Mighty and Majestic, certainly answers it, except an adulteress who strives (in immorality) with her private part, or an oppressive tax collector."
No one narrated this hadith from Hisham except Dawud, and Abd al-Rahman is alone in it.
Hadith Referenceالمعجم الأوسط / باب الألف / 2769
Hadith Gradingمحدثین:رجاله رجال الصحيح، وفيه علي بن زيد وفيه كلام
Hadith Takhrij«قال الهيثمي: رجاله رجال الصحيح إلا أن فيه علي بن زيد وفيه كلام وقد وثق «مجمع الزوائد ومنبع الفوائد، ج 3، ص 88»» «أخرجه أحمد فى «مسنده» برقم: 16537، 16538، 16539، 18187، 18197، 18194، والبزار فى «مسنده» برقم: 2320، والطبراني فى «الكبير» برقم: 8371، 8373، 8374، 8375، 8391»