Oecumenius

Along with the holy living creatures, the elders give glory to God; the act of casting their crowns before God signifies that the crown is a symbol of victory and kingship. Casting them before the throne of God, the true and genuine kingdom and the victory over all given to God who reigns over all.

Commentary on Revelation ↗

Alcuin of York

And when those living creatures gave glory, and honour, and benediction to him that sitteth on the throne, who liveth for ever and ever; the four and twenty ancients fell down, and adored him that liveth for ever and ever. Here the living creatures no longer indicate a genus, but a species, namely the evangelists; but by the twenty-four ancients is represented the universal Church in its superior and inferior members. …

Commentary On Revelation ↗

Victorinus of Pettau

And when these things were doing, he says that all the elders fell down and adored the Lord; while the living creatures-that is, of course, the actions recorded in the Gospels and the teaching of the Lord-gave Him glory and honour.31 In that they had fulfilled the word that had been previously foretold by them, they worthily and with reason exult, feeling that they have ministered the mysteries and the word of the Lord. …

Commentary on the Apocalypse of the Blessed John ↗