Bhagavad Gita 15.3-4

na rūpam asyeha tathopalabhyate
nānto na cādir na ca sampratiṣṭhā
aśvattham enaṁ su-virūḍha-mūlam
asaṅga-śastreṇa dṛḍhena chittvā

tataḥ padaṁ tat parimārgitavyaṁ
yasmin gatā na nivartanti bhūyaḥ
tam eva cādyaṁ puruṣaṁ prapadye
yataḥ pravṛttiḥ prasṛtā purāṇī

Synonyms

na — not; rūpam — the inverted form; asya — of this tree; iha — within this world; tathā — also; upalabhyate — that which is realized; na — never (without vedic knowledge); antaḥ — end; na — nor; ca — also; ādiḥ — its origins; na — never; ca — also; sampratiṣṭhā — the foundation; aśvattham — banyan tree; enam — this; su-virūḍha — strongly; mūlam — rooted; asaṅga-śastreṇa — getting the weapon of detachment form association with devotees- sadhu sanga; dṛḍhena — strong; chittvā —cutting; tataḥ —thereafter; padam — that place, (the lotus feet of the Lord); tat — that; parimārgitavyam — the way to which has to be searched out; yasmin — where; gatāḥ — going; na — never; nivartanti — they come back; bhūyaḥ — again; tam — to Him; eva — certainly; ca — also; ādyam — original; puruṣam — the Personality of Godhead; prapadye — surrender, take shelter of; yataḥ — from whom; pravṛttiḥ — the beginning; prasṛtā — extended; purāṇi — very old.

Translation
The true form of this inverted ashvattha tree cannot be seen in the material world and cannot be realized without vedic knowledge. Its beginning, foundation and end cannot be perceived or understood by anyone. Thereafter, getting the sharp axe of detachment through the association of the saintly devotees, one must firmly cut down this illusory tree of material association that is rooted in aversion to the Supreme Lord. Then, one must search out the place, where having once gone, one never returns to the material plane of existence, which is lotus feet of the Supreme Lord Viṣṇu. From there one must also certainly surrender to the Supreme Personality of Godhead, from whom this unending illusory tree of the material world has appeared.