Vedas state about Cyclic nature of time as discussed in answer here. But are there any statement in Vedas which state about Universe being projected as space-time ?
As a sidenote, Adi Shankaracharya in his famous Dakshinamurty stotram: states how apparent creation proceeds with the appearance of space-time through Maya:
बीजस्याऽन्तरिवाङ्कुरो जगदिदं प्राङ्गनिर्विकल्पं पुनः
मायाकल्पितदेशकालकलना वैचित्र्यचित्रीकृतम् ।
This World is Like a Sprout of a Seed Within which transforms what is Changeless state Before, appear Again as Space and Time, and endless Varieties of Pictures over it; all due to the Creation of Maya,