Love & Devotion to the Holy Prophet (sa)
Hazrat Mu‘az (ra) bin Jabal’s love and devotion to the Holy Prophet (sa) can also be gauged by the fact that when the Holy Prophet (sa) returned to Medina following the Battle of Uhud, sounds of wailing and lamenting could be heard in the streets. The Holy Prophet (sa) asked what it was? They replied that these were the wives of the Ansar, who were weeping for their martyrs. Upon this, the Holy Prophet (sa) said, “Is there no one to weep for Hamza?” The Holy Prophet (sa) then prayed for the forgiveness of Hazrat Hamza (ra).
When Hazrat Sa‘d (ra) bin Mu‘az, Hazrat Sa‘d (ra) bin Ubadah, Hazrat Mu‘az (ra) bin Jabal and Hazrat Abdullah (ra) bin Rawahah heard this, they went to their respective neighbourhoods and gathered the women of Medina who were wailing and weeping. They then said, “No one shall now mourn over the martyrs of the Ansar until they have mourned over the uncle of the Holy Prophet (sa), because he said there is no one in Medina to mourn over Hazrat Hamza (ra).” This was their love and devotion to the Holy Prophet (sa) upon seeing that he was in pain due to [the martyrdom of] Hazrat Hamza (ra).
(Ibn Hisham, al-Raud al-Anf fi Tafsir al-Sirah al-Nabawiyyah, Vol. 3, Ghazwat Uhud [Beirut, Lebanon: Dar al-Kutub al-Ilmiyyah, 1986], 95-96)