Musnad Ahmad

It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that once the Noble Prophet (peace and blessings be upon him) led the Fajr prayer, and after the prayer, he asked, one by one, mentioning the names of some people, "Is such-and-such a person present?" Each time, the people replied, "No." The Noble Prophet (peace and blessings be upon him) said, "These two prayers (Isha and Fajr) are the heaviest upon the hypocrites. If they knew the reward for them, they would surely attend them, even if they had to come crawling. And the first row is like the row of angels; if you knew its virtue, you would compete to attain it. And a person's prayer with another is more virtuous than praying alone, and praying with two is more virtuous than praying with one, and as the number increases, it becomes more beloved in the sight of Allah."

It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that once the Noble Prophet (peace and blessings be upon him) led the Fajr prayer, and after the prayer, he asked, one by one, mentioning the names of some people, "Is such-and-such a person present?" Each time, the people replied, "No." The Noble Prophet (peace and blessings be upon him) said, "These two prayers (Isha and Fajr) are the heaviest upon the hypocrites. If they knew the reward for them, they would surely attend them, even if they had to crawl. And the first row is like the row of angels; if you knew its virtue, you would compete to attain it. And a person's prayer with another is more virtuous than praying alone, and praying with two is more virtuous than praying with one, and the more the number increases, the more beloved it is in the sight of Allah."

The previous hadith is also narrated through this second chain of transmission.

Abdullah narrated to us, Abu Bakr Muhammad ibn Abdullah ibn Ja'far narrated to us, Abu Awn al-Ziyadi narrated to us, Abdul Wahid—meaning ibn Ziyad—narrated to us, from al-A'mash, from Abu Ishaq, from Abdullah ibn Abi Basir, from Ubayy ibn Ka'b, from the Prophet, peace and blessings be upon him, and he mentioned the hadith...

Abu Kamil Muzhaffar ibn Mudrik narrated to us, Zuhayr narrated to us, Abu Ishaq narrated to us, from Abdullah ibn Abi Basir, from his father, who said: I came to al-Madina and met Ubayy ibn Ka'b, so I said, "Abu al-Mundhir, tell me the most amazing hadith you heard from the Messenger of Allah, peace and blessings be upon him." He said: The Messenger of Allah, peace and blessings be upon him, led us (or led for us) the morning prayer, then turned to us with his face and said, "Is so-and-so present?" Then he mentioned the hadith...

Abdullah narrated to us, Yahya ibn Abdullah, the freed slave of Banu Hashim, narrated to us, Zuhayr narrated to us, from Abu Ishaq, from Abdullah ibn Abi Basir, from his father, who said: I came to Al-Madina and met Ubayy ibn Ka'b, and he mentioned something similar to that...

Abdullah narrated to us, Shaiban ibn Abi Shaybah narrated to us, Jarir ibn Hazim narrated to us, Abu Ishaq narrated to us, from Abu Basir al-Abdi, from Ubayy ibn Ka'b, who said: The Prophet of Allah, peace and blessings be upon him, prayed the morning prayer, then said: "Is so-and-so present?" Then he mentioned the hadith.

It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that once the Holy Prophet (peace and blessings be upon him) said: If people knew the reward of offering the Isha and Fajr prayers in congregation, they would surely participate in them even if they had to come crawling. It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that once the Holy Prophet (peace and blessings be upon him) led the Fajr prayer, and after the prayer, he asked, mentioning some people by name one by one, "Is such and such a person present?" Each time, the people replied, "No." The Holy Prophet (peace and blessings be upon him) said: These two prayers (Isha and Fajr) are the heaviest on the hypocrites. If they knew their reward, they would surely participate in them even if they had to come crawling. ... Then the narrator mentioned the entire hadith.

Abdullah narrated to us, Khalaf ibn Hisham al-Bazzar and Abu Bakr ibn Abi Shaybah narrated to us, they said: Abu al-Ahwas narrated to us, from Abu Ishaq, from al-Ayzar ibn Hurayth, from Abu Basir, who said: Ubayy said: The Messenger of Allah, peace and blessings be upon him, led us in the dawn prayer, and when he finished the prayer, he saw that the people in the mosque were few, so he said: "Is so-and-so present?" We said: Yes, until he counted three men, then he said: "There is no prayer heavier upon the hypocrites than the last night prayer (Isha) and the dawn prayer," and he mentioned the rest of the hadith at length.

It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that once the Noble Prophet (peace and blessings be upon him) led us in the Fajr prayer. After the prayer, turning towards us, the Noble Prophet (peace and blessings be upon him) said: "These two prayers (Isha and Fajr) are the heaviest upon the hypocrites."