Hanuman Chalisa, Chaupai 6
"saṅkar suvan kesarīnandan" is Chaupai 6 of the Hanuman Chalisa, which Tulsidas wrote in Awadhi. It means: You come from Shiva and are the son of Kesari. Your radiance and might are vast, and the whole world bows to you. Valmiki has Jambavan tell Hanuman that he is the son of Kesari and, by birth, the son of the Wind.
संकर सुवन केसरीनंदन ।तेज प्रताप महा जग बंदन ॥saṅkar suvan kesarīnandantej pratāp mahā jag bandan
You come from Shiva and are the son of Kesari. Your radiance and might are vast, and the whole world bows to you.
Tulsidas, Hanuman Chalisa, Chaupai 6, Gita Press reading
Valmiki has Jambavan tell Hanuman that he is the son of Kesari and, by birth, the son of the Wind.
स त्वं केसरिणः पुत्रः क्षेत्रजो भीमविक्रमः॥
Valmiki Ramayana, Kishkindha Kanda 4.66.24
Awadhi text: Goswami Tulsidas, Gita Press reading, checked against three Gita Press printings and Rambhadracharya's Mahaviri. English meaning and word glosses: Wisdom's own, following the traditional reading, edited by Ankur Shukla.