Praying between the pillars
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Question: (What is) the ruling of (performing) the prayer between the pillars?

Response: The (performance of the) prayer between the pillars is permissible when there is lack of space. As for when there is plenty (of space), then one should not pray between the pillars because that splits the (continuity of the) rows.

Shaykh Ibn 'Uthaymeen
Majmoo' Fataawa wa Rasaa.il Muhammad ibn Saalih al-'Uthaymeen - Volume 13, Fatwa No.391