Soon after Jimbun’s return, the chiefs named Sera Gindik and Empangai called for a grand conference to plan for a new migration from Semitau to the Batang Ai region in Sarawak border. All those who attended the conference agreed to the migration plan. The Iban living at Semitau then made preparations to move to the Ketungau region, a true right tributary of the Kapuas. It will be from Ketungau region that they will send scouts to the Batang Ai to survey the suitable land for farming. The scouts returned to inform them that there are plenty of land for farming as well as the abundance of fish in the rivers and plenty of game in the forest.
On hearing these reports, the Iban were very pleased. The wasted no more time at the Ketungau region and migrate quickly to this new country. Before their separations, they agreed not to become disunited to avoid being beaten by other tribes like the Bukitans, Seru, Ukit, Kantu and other tribes they encounter in their migration journey.
From the Kapuas, the Iban ascended the Ketungau River to a place called Bila Dua. Here they intended to settle for a time at Tapang Peraja. As they were about to land their boat at Bila Dua, they heard the call of an omen bird, Bejampong (crested jay), from the right hand bank of the river. On hearing this, a council of chiefs was held and it was declared that they should stay there in temporary huts for seven days to honour the call of the omen bird, Bejampong. Afterwards, a second meeting was held to discuss the implications the Bejampong augury. In this meeting, Chief Sagan-Agan assured them that they should not leave that place until they have stayed there for three farming years.