Rig 1.191.02

समानो मन्त्रः समितिः समानी समानं मनः सह चित्तमेषाम्। समानं मन्त्रमभि मन्त्रये वः समानेन वो हविषा जुहोमि॥

Common be the prayer of these (assembled worshippers), common be the acquisition, common the purpose, associated be the desire. I repeat for you a common prayer, I offer for you with a common oblation.