Śrīmad-Bhāgavatam · Text 10.20.36
Who is speaking and story frame
गिरयो मुमुचुस्तोयं क्वचिन्न मुमुचु: शिवम् ।
यथा ज्ञानामृतं काले ज्ञानिनो ददते न वा ॥ ३६ ॥
girayo mumucus toyaṁ
kvacin na mumucuḥ śivam
yathā jñānāmṛtaṁ kāle
jñānino dadate na vā
During this season the mountains sometimes released their pure water and sometimes did not, just as experts in transcendental science sometimes give the nectar of transcendental knowledge and sometimes do not.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.