Say, [O Muhammad], “My Lord has ordered justice and that you maintain yourselves [in worship of Him] at every place [or time] of prostration, and invoke Him, sincere to Him in religion.” Just as He originated you, you will return [to life] –
Meaning:-
Prostrate: lying stretched out on the ground with one’s face downward, especially in reverence or submission.
Invoke: appeal to, pray to, call on.