Is the Hadith "Work is like worship" authentic or weak?

The hadith "Work is worship" has no origin in the books of Hadith and Athar, and it is impermissible to attribute it to the Prophet (peace be upon him).

Permissible work can become an act of worship if a Muslim intends a good intention by it, such as refraining from asking people for help, spending on one's family, or giving charity to the needy, provided that this work does not distract him from the obligations Allah has enjoined upon him.

Work done for worldly gain is not in itself worship, unless it leads to something Islamically desirable, such as refraining from asking people for help, and its reward is according to the intention of the doer.