Bhagavad Gita · 7.25

नाहं प्रकाशः सर्वस्य योगमायासमावृतः।मूढोऽयं नाभिजानाति लोको मामजमव्ययम्॥

nāhaṁ prakāśhaḥ sarvasya yoga-māyā-samāvṛtaḥ mūḍho 'yaṁ nābhijānāti loko mām ajam avyayam

I am not manifest to everyone, being veiled by My yoga-maya. This deluded world does not know Me, the unborn and imperishable.

— Bhagavad Gita 7.25

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)