AN 10.25 Ten universal dimensions of meditation, or kasiṇas.

AN 10.26 The female lay follower Kāḷī of Kuraraghara in Avantī asks Venerable Mahākaccāna about a verse spoken by the Buddha in “The Maidens’ Questions” (SN 4.25). He replies in terms of the ten universal dimensions of meditation.

AN 10.27 Some wanderers claim to teach the direct knowledge of all things, just like the Buddha. However the Buddha disputes this by presenting ten “Great Questions” that they cannot answer.