Hadith 782:14
Abu al-Yaman narrated to us, he said: Abu Bakr ibn Abdullah narrated to us, from Habib ibn Ubayd, from Amr ibn Abasah, from the Prophet, peace and blessings of Allah be upon him, who said: "The night prayer is two by two, and the latter part of the night is the most responsive for supplication." I said: "Is it 'awjabuhu' (the most obligatory)?" He said: "No, rather 'ajwabuha' (the most responsive)," meaning by that the response.
حدثنا أبو اليمان، قال: حدثنا أبو بكر بن عبد الله، عن حبيب بن عبيد، عن عمرو بن عبسة، عن النبي صلى الله عليه وسلم قال: " صلاة الليل مثنى مثنى، وجوف الليل الآخر أجوبه دعوة " قلت: أوجبه؟ قال: لا بل أجوبه يعني بذلك الإجابة،