After the Mongol invasion Bela IV returned and started to rebuild the destroyed places of the country. In the course of this, the abbey of Egres was repaired, but the renovation works did not represent the complete reconstruction of the abbey. King Béla lured the Cumans back into the country and settled them in the Alföld territory. At that time, the Turkish-speaking group was the main base of the royal army. Cumans were difficult to integrate with the contemporary Hungarian economic and political system, so their insertion was a longer period. Later Bela’s granson, Laszlo IV. rely on the the Cumans against the party-torn nobles. The Church tried to mediate between the king and the nobleman in this aggravated relationship. However, the papal legate arriving to Hungary and supposed to act as a mediator, turned against the Cumans considered pagan. László IV., to consolidate his foreign policy and domestic affairs, has undertaken to limit the rights of the Cumans. This triggered the dissatisfaction of the Cumans.

This series of events directly affected Egres. The abbey received special attention at this time, as László IV. kept a part of the treasury in the monastery because the area was far from the Transdanubian region exposed to the Austrian attacks. Cumans turned against the king and attakcked the monastery. The attack was not as large as the Mongolian siege, as the Cumans as they were told of the arrival of the royal army, abandoned the occupation. Later László IV. was certainly present at Egres. This is evidenced by a diploma from September 1288. Probably another royal diploma was written in Egres in 1290, which the king makes a decree of the Zoych estate adjacent to Toxun. King Andrew III. also supported the abbey, and in 1299 he confirmed the request of Egyed, the abbot of Egres, which the abbey received from István V. According to this, the abbey was directly under the king's jurisdiction and noone else could exercise jurisdiction over it.