Yes, there are statements from the scriptures which strongly suggest that Brahma is the personified brahman.
First, who/what is brahman and what is the definition of brahman? This is what the Taittiriya upanishad says on this matter -
Taittiriya upanishad 3.1.3
taṃ hovāca | yato vā imāni bhūtāni jāyante | yena jātāni jīvanti | ...
Purusha Sukta appears in 10th Mandala.
Many scholars inferred that both 1st and 10th Mandalas of Rig Veda, compared to 2nd to 7th Mandalas - the oldest part of the Rigveda, are younger.
So the content in those 1st and 10th Mandalas is large (2006 and 1754 mantras respectively), compared to 2 to 7 Mandalas. Further, the expression of ideas also changes, ...
Is Purusha (mentioned in Purusha suktam) same as Brahman (Parabrahman)?
Yes, he is.
The Purusha is described as the origin of the universe, the elements, all the Devas, all the worlds, and everything in creation:
tasmAt virAd ajAyata
From the Purusha was born the universe.
He is also described as the being whom if a person knows, that person ...
Why has God created material system/universe?
According to the Brahma Sutras, it is for sport; a pastime.
33. But (it is) mere sport, as in ordinary life.
And Ramanujacharya's commentary for that sutra:
The motive which prompts Brahman--all whose wishes are fulfilled and who is perfect in himself--to the creation of a world comprising all kinds of ...