Matsya Purana 264.22

264.22

dhvajāṃśca lokapālānāṃ sarvadikṣu niveśayet.
patākā jaladākārā madhye syānmaṇḍapasya tu .. 264.21

Mandapa is a temporary building created for performing a ceremony The banners of the Lokapâlas should be hung all round and in the centre of the pandal a banner of the shape of the clouds should be hung—21