You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Kathmandu

Context:
Very few historical records exist of the period before the medieval Licchavis rulers. According to Gopalraj Vansawali, a genealogy of Nepali monarchs, the rulers of Kathmandu Valley before the Licchavis were Gopalas, Mahispalas, Aabhirs, Kirants, and Somavanshi. The Kirata dynasty was established by Yalamber. During the Kirata era, a settlement called Yambu existed in the northern half of old Kathmandu. In some of the Sino-Tibetan languages, Kathmandu is still called Yambu. Another smaller settlement called Yengal was present in the southern half of old Kathmandu, near Manjupattan. During the reign of the seventh Kirata ruler, Jitedasti, Buddhist monks entered Kathmandu valley and established a forest monastery at Sankhu.

Question:
What religion did the Sankhu monastery belong to?

Buddhist