[Advaita-l] Source of SriSitarama shloka

[Chitra Ravi]

Namaste
What is the source of Hanumat kruta Sri Sitarama shloka
starting with

अयोध्यापुरनेतारं मिथिलापुरनायिकाम् ।
राघवाणामलङ्कारं वैदेहानामलङ्क्रियाम् ॥ 1

and when was it sung?

Many thanks