Source of Vasudeva Sutam Devam
Vasudeva Sutam Devam (वसुदेवसुतं देवं ) verse is taken from Krishna Ashtakam (कृष्णाष्टकम्), there seems to be multiple compositions of Krishna Ashtakam, by different authors at different times.
The author of this particular Krishna Ashtakam (कृष्णाष्टकम्) is not known. Adi Sankaracharya also composed different Krishna Ashtakam.
Vasudeva Sutam Devam with Hindi and English meaning
वसुदेवसुतं देवं कंसचाणूरमर्दनम्
देवकीपरमानन्दं कृष्णं वन्दे जगद्गुरुम्
कंस और चाणूर का वध करने वाले, हे वसुदेव नन्दन । देवकी के आनन्दवर्द्धन, जगद्गुरु श्री कृष्ण हम आपकी वन्दना करते हैं ।
Son of Vasudeva, divine lord, the killer of Kamsa and Chanura, the supreme happiness of Devaki, we bow to Krishna, the teacher of the universe.