The Devil Oath 1988 on netflix

Lintang and Bayu, held a pocong oath, due to the insistence of the villagers who felt their village was polluted. This was done because Lintang, who had just become engaged to Bayu, was declared pregnant, they had sworn not to do anything and did not know that Lintang could become pregnant. Once the oath is executed, the Oath has no consequences.