The Richs, the Samans, the Yajuses, have each a beginning. Those that have a beginning have also an end. But Brahma is said to be without beginning.
ऋचामादिस्तथा साम्नां यजुषामादिरुच्यते। अन्तश्चादिमतां दृष्टो न त्वादिब्रह्मणः स्मृतः॥