יְֽהוָ֗ה יִ֭סְעָדֶנּוּ עַל־עֶ֣רֶשׂ דְּוָ֑י כָּל־מִ֝שְׁכָּב֗וֹ הָפַ֥כְתָּ בְחָלְיֽוֹ׃
Le Seigneur le soutiendra sur le lit de douleur; sa couche, tu la retournes entièrement dans sa maladie.
Kitzur Shulchan Arukh
When the patient lies on the ground, the visitor may not sit upon a chair which is more elevated than he is, because the Divine Presence is above the head of the sick, as it is said, "Hashem will support him on the bed of his illness."5Psalms 41:4. But when the patient lies in bed, the visitor may sit on a chair or a bench.