Is the Hadith "Do not feign illness, lest you become ill and then die" authentic?

The Hadith: "Do not feign illness, lest you fall ill, and do not dig your graves, lest you die," is not authentically attributed to the Prophet, peace and blessings be upon him. Its defect lies with Muhammad ibn Sulayman al-Sagani, who is an unknown narrator, and the Hadith he narrated is deniable (munkar).