Verse
यातयामं गतरसं पूति पर्युषितं च यत् ।उच्छिष्टमपि चामेध्यं भोजनं तामसप्रियम् ॥
The tamasic temperament takes a perverse pleasure in cold, impure, stale, rotten or tasteless food or even accepts like the animals the remnants half-eaten by others.
Gītā 17·10