Verse 15

प्रविशामि नभःसंस्थं मुकुरं प्रतिबिम्बवत् ।इत्यसौ मुनिरादित्यं विवेशानिलरूपधृक्

In plain words

that I shall enter, where it stands in the sky, as a reflection enters a mirror.' So saying, that sage entered into Āditya, bearing a form of wind.