At the eve of the Battle of Qadisiya-Muharram, 14AH

After Omar bin Khattab(RA) accepted Khilafat he deputed Saad bin Abi Waqqas, the maternal uncle of the Prophet (SA) to retake Persia.Yezdgird was the Persian ruler at that time.Yezdgird once told the delegation of muslim emissaries before the Battle of Qadisiya :

"O Arabs, not very long ago no people on earth were so wretched or rotten as you. The smallest favor from us was enough to win you. Whenever you did a mischief, we wrote to a frontier chief and he set you right. I advise you to give up your whims of conquest. If you do not have enough food or other necessities, let us know. We will send you supplies. We will also appoint a good ruler over you, that he may treat you kindly."

When the king had finished, Mughira bin Zarara rose and spoke back:
"O king, we were certainly as wretched as you have said; perhaps worse. We ate dead animals, wore skins and slept on the bare ground. But ever since Allah's chosen Prophet appeared among us, we have totally changed. His wonderful teachings and his lofty example have made us leaders of the world. Even proud kings like you fear us now."

"O king, any further talk is useless. Either accept the chosen Prophet of Allah and bow before his blessed teachings or agree to pay the jizya. If you accept neither of the two things, then wait for the sword to decide."

Mughira's words made the king lose his temper. "By Yazdan," he roared in anger, "if it were not against the law to shed the blood of envoys, I must have got you beheaded. But I am sending Rustam to deal with you.

Later Mughira bin Shaaba met Rustam. Rustam did all he could to dazzle the eyes of the Arab envoy. He sat on a throne of gold with a crown of diamonds on his head. The whole court was decked with brocades, gold and diamonds.

Mughira got down from his horse and walked straight to Rustam's throne. He climbed onto it and sat by Rustam's side. All present were taken back. The guards ran forward and made Mughira get down from the throne.

Mughira remained cool. Addressing the courtiers, he said:

"O nobles of Iran, I thought you were wise. But you have proven quite silly. We Muslims do not raise men to the position of gods. The weak among us do not believe in the overlordship of the strong. I thought you also followed the same practice. I never knew that the strong among you were raised high and were worshipped by the weak. I never knew that you did not believe in the equality of men. If I had known that, I would never have come to your court. But let me tell you that you cannot save your empire by these methods. Unrest among the weak will turn the tables against you."

Mughira's speech ended the peace talks. But his words continued to ring in the ears of the Iranian nobles.