﴿ وَٱلسَّٰبِقُونَ ٱلسَّٰبِقُونَ ﴾

“But the foremost shall be [they who in life were] the foremost [in faith and good works]:”

And the foremost in the race to do good namely the prophets al-sābiqūna is a subject the foremost this repetition is to emphasise their exalted status; the predicate is the following ūlā’ika’l-muqarrabūna