Musannaf Ibn Abi Shayba 30:147

Waki' narrated to us, from Ja'far ibn Burqan, from Habib ibn Abi Marzuq, from 'Ata' ibn Abi Rabah, from Abu Muslim al-Khawlani, from Mu'adh ibn Jabal and 'Ubadah ibn al-Samit, they said: We heard the Messenger of Allah (may Allah bless him and grant him peace) narrating from his Lord, He says: "My love is incumbent upon those who love one another for My sake, and My love is incumbent upon those who spend for one another for My sake, and My love is incumbent upon those who visit one another for My sake." And those who love one another for the sake of Allah will be upon pulpits of light in the shade of the Throne, on a day when there is no shade but His shade.