Tattvabodha - Verse 5.1
Sanskrit
अन्नमयः कः ? अन्नरसेनैव भूत्वा अन्नरसेनैव वृद्धिं प्राप्य अन्नरूपपृथिव्यां यद्विलीयते तदन्नमयः कोशः स्थूलशरीरम् ।
Translation
What is the food sheath? That which is born of the essence of food, grows by the essence of food, and merges into the earth which is of the nature of food, is the food sheath—the gross body.
Word-for-Word
annamayaḥ kaḥ? (what is the food sheath?); anna-rasena-eva (by the essence of food alone) bhūtvā (having become), anna-rasena-eva (by the essence of food alone) vṛddhiṃ prāpya (having attained growth), anna-rūpa-pṛthivyāṃ (in the earth which is of the form of food) yad-vilīyate (that which merges), tat (that is) annamayaḥ kośaḥ (the food sheath) sthūla-śarīram (the gross body).
Index: Tattvabodha

Muni's Play