If it was briefly as in the case of 10 seconds, you don’t have to pray it again. But if it was to get something from the car, you should pray it again.

And Allah knows best

If i enter a mosque and pray tahiyat masjid and step out briefly and come back again, do I have to pray tahiyat masjid again?

Rulings on mosques | March 13, 2014 3:40 pm
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I’ve heard from someone that there is some hadeeth which has the meaning like khateeb’s having long sermons than the friday prayers, or the wisdom of khateeb’s can be assessed his sermon is shorter than the friday prayer. i’ve also heard that practice of salf-ussualeheein was to have short friday sermon than the friday prayers, is it correct?