Iha bee matan Ermatu, iha Tartehi, Maubisi, tinan-tinan komunidade sira halo rituál ai-hulun. Rituál la'o loron tolu mos parte tolu-saur to'os, piut besi ho aihuka. Aihuka ritual ida ne'ebé atu kompleta rituál saur to'os ka mambiuka ne'e. Rituál ida ne'e rasik nu'udar prosesu ida atu komunidade hotu la'o tuir fali bee matan hotu ne'ebé iha knua laran hodi husu agradesimentu ba bei-ala sira nomós espíritu sira ne'ebé hein bee ne'e. Rituál aihuka ne'e mak rohan husi rituál saur to'os no piut besi. Iha Suco Maubisi, liu-liu ba knua Tartehi, Lekitehi no Kalala halao ritua2l aihuka ne'e iha bee matan Ermatu no Ertama. Komunidade sira sei la'o husi knua laran no ba dahuluk sei bá bee matan Ermatu ne'ebé iha fatin lulik ida naran 'Helumau Aitir Ermata nor Usnei'. Kondisaun úniku ida husi bee-matan hotu iha Sub distrito Maubisi ne'e mak bee-matan hotu-hotu iha bee matan feto no bee matan mane. Klasifikasaun bee-matan feto no bee-matan mane hodi halo tuir tradisaun fase matan nian. Bainhira labarik mane ida moris mai mak iha loron hitu tuirmai sei fase matan husi bee ne'ebé ba kuru iha bee-matan mane ne'e. Nune'e mós ba labarik feto ida, mak bee ne'ebé sei uza ba fase matan sei ba kuru husi bee-matan feto (Tetum text drawn from Demetrio do Amaral Carvalho).
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In the Maubisi village of Tartehi each year in March or April, traditional 'new year' rituals (Mambai: Ai Hulun) are carried out to honour and recreate relationships and alliances across time and space. This annual agricultural ceremony continues over three days and includes a harvest festival (saur to'os), a new year celebration and honouring of the ancestors (piut besi), and a ceremony carried out at sacred springs Ermata and Ertama to ritually 'cool' the community (aihuka). Honouring ancestral connections, it begins with people across the valley gathering at Tartehi sacred house complex where ritual drumming and sacred narrative accounts are told by elders well into the night. Over the subsequent days, as the number of people gathered continues to swell, the group set off on a circular procession through the landscape meeting up with the custodians of particular sacred sites along the way. In total they carry out celebratory rituals and offerings at seven sites, culminating in a ceremony at two ritually paired male and female springs (understood as the origins or sources of the community).

A unique feature of all the natural springs in the Maubisi sub-district is the presence of a male and a female spring in order to facilitate a tradition of eye-washing (Tetun: "fase matan"). For seven days after a boy child is born, his eyes will be washed with water collected from the male spring. Similarly a girl child's eyes will be washed with water from the female spring.