Musnad Ahmad 1153:1241

'Abd al-Samad ibn 'Abd al-Warith narrated to us, Muhammad ibn Mahzam narrated to us, from 'Abd al-Rahman ibn al-Qasim, al-Qasim narrated to us, from 'Aishah: That the Prophet, peace and blessings of Allah be upon him, said to her: "Whoever is given his portion of gentleness, he has been given his portion of the good of this world and the Hereafter. And maintaining ties of kinship, good character, and good neighborliness build up the homes and increase the lifespans."