"sahas badan tumharo jas gāvaiṁ" is Chaupai 13 of the Hanuman Chalisa, which Tulsidas wrote in Awadhi. It means: "May the thousand-mouthed Shesha sing your glory," said Rama, lord of Shri, and he held you close. When Hanuman returns with news of Sita, Valmiki has Rama say that an embrace is all he can give him in return.
सहस बदन तुम्हरो जस गावैं ।अस कहि श्रीपति कंठ लगावैं ॥sahas badan tumharo jas gāvaiṁas kahi śrīpati kaṇṭh lagāvaiṁ
"May the thousand-mouthed Shesha sing your glory," said Rama, lord of Shri, and he held you close.
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.