Yazid bin Abi Maryam (may Allah have mercy on him) said: I heard A'idhullah Abu Idris al-Khawlani (may Allah have mercy on him) say: I said to Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him): I love you for the sake of Allah. So he took hold of my waist and pulled me towards him, then said: By Allah, do you love me? I said: By Allah, I love you for the sake of Allah. He said: Rejoice, for I heard the Messenger of Allah (peace and blessings be upon him) say: "Those who love one another will be in the shade of His Throne, on the day when there is no shade except His shade."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17285