Śrīmad-Bhāgavatam · Texts 4.29.23-25
Who is speaking and story frame
आधयो व्याधयस्तस्य सैनिका यवनाश्चरा: ।
भूतोपसर्गाशुरय: प्रज्वारो द्विविधो ज्वर: ॥ २३ ॥
एवं बहुविधैर्दु:खैर्दैवभूतात्मसम्भवै: ।
क्लिश्यमान: शतं वर्षं देहे देही तमोवृत: ॥ २४ ॥
प्राणेन्द्रियमनोधर्मानात्मन्यध्यस्य निर्गुण: ।
शेते कामलवान्ध्यायन्ममाहमिति कर्मकृत् ॥ २५ ॥
ādhayo vyādhayas tasya
sainikā yavanāś carāḥ
bhūtopasargāśu-rayaḥ
prajvāro dvi-vidho jvaraḥ
evaṁ bahu-vidhair duḥkhair
daiva-bhūtātma-sambhavaiḥ
kliśyamānaḥ śataṁ varṣaṁ
dehe dehī tamo-vṛtaḥ
prāṇendriya-mano-dharmān
ātmany adhyasya nirguṇaḥ
śete kāma-lavān dhyāyan
mamāham iti karma-kṛt
The followers of Yavaneśvara [Yamarāja] are called the soldiers of death, and they are known as the various types of disturbances that pertain to the body and mind. Prajvāra represents the two types of fever: extreme heat and extreme cold — typhoid and pneumonia. The living entity lying down within the body is disturbed by many tribulations pertaining to providence, to other living entities and to his own body and mind. Despite all kinds of tribulations, the living entity, subjected to the necessities of the body, mind and senses and suffering from various types of disease, is carried away by many plans due to his lust to enjoy the world. Although transcendental to this material existence, the living entity, out of ignorance, accepts all these material miseries under the pretext of false egoism (“I” and “mine”). In this way he lives for a hundred years within this body.
Read Śrīla Prabhupāda's purport on Vedabase.io