श्रीभगवान्
In plain words
The Blessed Lord said: Now I shall tell you the chief of My divine Vibhūtis, best of Kurus; there is no end to their full extent.
Word for word
Now I shall tell you My own divine vibhūtis indeed, by eminence, O best of the Kurus; there is no end of My extent.
The commentators
Bhagavadgītābhāṣyam· bhāṣya
हन्त इदानीं ते तव दिव्याः दिवि भवाः आत्मविभूतयः आत्मनः मम विभूतयः याः ताः कथयिष्यामि इत्येतत् । प्राधान्यतः यत्र यत्र प्रधाना या या विभूतिः तां तां प्रधानां प्राधान्यतः कथयिष्यामि अहं कुरुश्रेष्ठ । अशेषतस्तु वर्षशतेनापि न शक्या वक्तुम् , यतः नास्ति अन्तः विस्तरस्य मे मम विभूतीनाम् इत्यर्थः ॥ १९ ॥
In plain words
Well then — listen now. I will tell you of my own divine manifestations, born, as it were, in the very heaven of my being — glories that are truly mine. This is my promise. I will tell you, chiefly, whichever manifestation stands out as the principal one in each case, O best of the Kurus. But to tell them all completely — that could not be done even in a hundred years, because there is simply no end to the vast expanse of my manifestations.
Close to the Sanskrit
Well then, now, to you — your — divine, born in heaven, are the Self's own manifestations; of the Self, my, manifestations, which — those I will tell; this is what I will do. According to primary importance, wherever there is a principal manifestation, that very principal one, according to primary importance, I will tell, I, O best of the Kurus. But completely, even in a hundred years, it is not possible to tell, because there is no end to the expanse of my, of my, manifestations; this is the meaning.