It is mentioned in Padma Purana that
ārādhanānāṁ sarveṣāṁ viṣṇor ārādhanaṁ param
Of all types of services, service of Lord Krishna is best, and better than the worship of Lord Viṣṇu is the service of His devotee, the Vaiṣṇava.
Feed the Vaishnavas & Sadhus of ISKCON Juhu and get the blessings of Lord Krishna for your family.
Bhagavad Gita 2.40
In this endeavour of offering service to Lord Kṛṣṇa, you get eternal credit, and even a little service offered to Lord Kṛṣṇa can protect one from the greatest type of fear.
Srimad Bhagavatam 10.11.11
While Kṛṣṇa was going to the fruit vendor very hastily, most of the grains He was holding fell. Nonetheless, the fruit vendor filled Kṛṣṇa’s hands with fruits, and her fruit basket was immediately filled with jewels and gold.
Srimad Bhagavatam 10.22.35
It is the duty of every living being to perform welfare activities for the benefit of others with one’s life, wealth, intelligence and words.