Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) used to pray four rak'ahs before Zuhr, when the sun passed the meridian. I said: O Messenger of Allah, what prayer is this? He (peace and blessings be upon him) said: "The gates of the heaven are opened when the sun passes the meridian and remain open until Zuhr is prayed, and I love that a righteous deed of mine should be raised up during (those moments)."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4016
It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) concerning the four rak'ahs before Zuhr: (He narrates that) I said: O Messenger of Allah, what is this prayer that you always pray when the sun passes the meridian? He (peace and blessings be upon him) said: "O Abu Ayyub, the gates of the heaven are opened when the sun passes the meridian, and the gates of the heavens are not closed until Zuhr is prayed." I asked: Is there recitation in them? He (peace and blessings be upon him) said: "Yes." I asked: Are they separated by a salam? He (peace and blessings be upon him) said: "No."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4017
It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) always used to pray four rak'ahs before Zuhr when the sun passed the meridian. (Then the narrator) narrated a similar hadith.
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4018
It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) always used to pray four rak'ahs when the sun passed the meridian. (Then the narrator) narrated a hadith like it.
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4019
It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him); he said: When the Messenger of Allah (peace and blessings be upon him) came to stay with me, I saw that he always prayed four rak'ahs before Zuhr, and he said: "When the sun passes the meridian, the gates of the heaven are opened, and none of them is closed until Zuhr is prayed, so I love that a righteous deed of mine should be raised up in that hour."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4020
It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him); he said: I said: O Messenger of Allah, what are these four rak'ahs? He (peace and blessings be upon him) said: "This is the hour in which the gates of the heaven are opened, and they are not closed until Zuhr is prayed, so I love to be ahead (in good deeds)."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4021