1 Timothy 4:3

Sensuality leads to false spiritualism. Their own inward impurity is reflected in their eyes in the world without them, and hence their asceticism (Tit 1:14-15) [WIESINGER]. By a spurious spiritualism (Ti2 2:18), which made moral perfection consist in abstinence from outward things, they pretended to attain to a higher perfection. Mat 19:10-12 (compare Co1 7:8, Co1 7:26, Co1 7:38) gave a seeming handle to their "forbidding marriage" (contrast Ti1 5:14); and the Old Testament distinction as to clean and unclean, gave a pretext for teaching to "abstain from meats" (compare Col 2:16-17, Col 2:20-23). As these Judaizing Gnostics combined the harlot or apostate Old Testament Church with the beast (Rev 17:3), or Gnostic spiritualizing anti-Christianity, so Rome's Judaizing elements (Ti1 4:3) shall ultimately be combined with the open worldly-wise anti-Christianity of the false prophet or beast (Ti1 6:20-21; Col 2:8; Jo1 4:1-3; Rev 13:12-15). Austerity gained for them a show of sanctity while preaching false doctrine (Col 2:23). EUSEBIUS [Ecclesiastical History, 4.29] quotes from IRENÆUS [1.28] a statement that Saturninus, Marcion, and the Encratites preached abstinence from marriage and animal meats. Paul prophetically warns against such notions, the seeds of which already were being sown (Ti1 6:20; Ti2 2:17-18). to be received--Greek, "to be partaken of.

— Jamieson-Fausset-Brown Commentary (public domain)