The Jewish manner of adoration was by prostration, bowing, and kneeling. The Christians adopted the Grecian, rather than the Roman, method, and always adored uncovered. The ordinary posture of the ancient Christians was kneeling; but on Sundays, standing.

ADORATION is also used for certain extraordinary acts of civil honour, which resemble those paid to the Deity, yet are given to men.

A Biblical and Theological Dictionary — Part 55

We read of adorations paid to kings, princes, emperors, popes, bishops, abbots, &c, by kneeling, falling prostrate, kissing the feet, hands, garments, &c.

A Biblical and Theological Dictionary — Part 55

The Persian manner of adoration, introduced by Cyrus, was by bending the knee, and falling on the face at the prince’s feet, striking the earth with the forehead, and kissing the ground. This was an indispensable condition on the part of foreign ministers and ambassadors, as well as the king’s own vassals, of being admitted to audience, and of obtaining any favour. This token of reverence was ordered to be paid to their favourites as well as to themselves, as we learn from the history of Haman and Mordecai, in the book of Esther; and even to their statues and images; for Philostratus informs us that, in the time of Apollonius, a golden statue of the king was exposed to all who entered Babylon, and none but those who adored it were admitted within the gates. The ceremony, which the Greeks called ϖροσκυνεῖν, Conon refused to perform to Artaxerxes, and Callisthenes to Alexander the Great, as reputing it impious and unlawful.

A Biblical and Theological Dictionary — Part 55

The adoration performed to the Roman and Grecian emperors consisted in bowing or kneeling at the prince’s feet, laying hold of his purple robe, and then bringing the hand to the lips. Some attribute the origin of this practice to Constantius. They were only persons of rank or dignity that were entitled to the honour. Bare kneeling before the emperor to deliver a petition, was also called adoration.

It is particularly said of Dioclesian, that he had gems fastened to his shoes, that divine honours might be more willingly paid him, by kissing his feet. And this mode of adoration was continued till the last age of the Greek monarchy. When any one pays his respects to the king of Achen in Sumatra, he first takes off his shoes and stockings, and leaves them at the door.