Wabisah bin Ma'bad (may Allah be pleased with him) says that the Prophet (peace and blessings be upon him) saw a man praying alone behind the row. He (peace and blessings be upon him) ordered him "to repeat his prayer."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5207
It is narrated from Wabisah bin Ma'bad (may Allah be pleased with him) that he (peace and blessings be upon him) saw a man who was praying alone behind the row. He (peace and blessings be upon him) ordered him "to pray again."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5208
Hilal bin Yisaf says: Ziyad bin Abi al-Ja'd took me by the hand and stood me beside a man in Raqqah, then said that the Messenger of Allah (peace and blessings be upon him) saw a man praying alone behind the row, so he (peace and blessings be upon him) ordered him "to repeat the prayer." This was Wabisah bin Ma'bad al-Asadi (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5209
Ziyad bin Abi al-Ja'd narrates from Wabisah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) saw a man praying alone behind the rows, so he (peace and blessings be upon him) ordered: "He should repeat the prayer."
It has also been narrated through a weak chain from al-Sha'bi from Wabisah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5210
Wabisah (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) saw a man who was praying alone behind the rows. He (peace and blessings be upon him) said: "O you who pray alone! Why did you not join the row?" He said: "Why did you not pull a man towards you who would stand with you? Pray again."
Only al-Sari bin Isma'il narrated it, and he is da'if (weak).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5211
Muqatil bin Hayyan (may Allah have mercy on him) says that the Prophet (peace and blessings be upon him) said: "If a man comes and does not find anyone, let him pull a man from the row to himself so that he stands with him; how great is the reward of the one who is pulled!"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5212
It is narrated from Ali bin Shayban (may Allah be pleased with him) that he was in the delegation of Banu Suhaym that came to the Prophet (peace and blessings be upon him). We prayed a prayer with the Prophet (peace and blessings be upon him), and the Prophet (peace and blessings be upon him) glanced from the corner of his eye at a man who was not straightening his back in bowing and prostration. When he (peace and blessings be upon him) said the salam, he said: "O people! There is no prayer for a man who does not straighten his back in bowing and prostration."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5213
Mughirah narrates from Ibrahim regarding a man who prays alone behind the row that he (Ibrahim) said: "His prayer is complete, but he does not get the multiplied reward."
Note: The Shaykh says that the Prophet (peace and blessings be upon him) negated the extra reward of the congregation, and ordered him to repeat it so that he could obtain the extra reward.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5214