Bhagavad Gita 18.69
There is no one among men who can perform a service dearer to Me than this, nor is there any man on earth more beloved by Me than him.
न च तस्मान्मनुष्येषु कश्िचन्मे प्रियकृत्तमः।भविता न च मे तस्मादन्यः प्रियतरो भुवि॥na ca tasmānmanuṣyeṣu kaśicanme priyakṛttamaḥ|bhavitā na ca me tasmādanyaḥ priyataro bhuvi||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).