At the door of shops brothers and friends are numerous; at the door of misery there are no brothers and no friends (Shab. 32a; D. 1).
To a similar effect is "The poor is hated even of his own neighbour: but the rich hath many friends" (Prov. xiv. 20).
Cf. "The rich never want kindred";
"No one claims kindred with the poor";
"Poverty parteth fellowship."