Mahabharata 3.80.58

दुष्करं पुष्करं गन्तुं दुष्करं पुष्करे तपःदुष्करं पुष्करे दानं वस्तुं चैव सुदुष्करम्

duṣkaraṃ puṣkaraṃ gantuṃ duṣkaraṃ puṣkare tapaḥduṣkaraṃ puṣkare dānaṃ vastuṃ caiva suduṣkaram

Our plain-language meaning of this verse is waiting for scholar review.