Another interpretation: "Let my lord, I pray, pass over" — he said to him: until now I still have before me the work of the Tabernacle and the work of the Temple, for the sake of the children. He said to him: until now I still have to raise up Hananiah, Mishael, and Azariah, of whom it is said, "children in whom was no blemish" (Daniel 1:4).
Still Ahead Lies the Tabernacle and the Three Faithful Youths
Yalkut Shimoni on Torah 133:20
דָּבָר אַחֵר, יַעֲבָר נָא אֲדֹנִי אָמַר לֵיהּ, עַד עַכְשָׁו יֵשׁ לְפָנַי לַעֲשׂוֹת מְלֶאכֶת הַמִּשְׁכָּן וּמְלֶאכֶת הַמִקְדָּשׁ לְרֶגֶל הַיְלָדִים, אָמַר לֵיהּ, עַד עַכְשָׁיו, יֵשׁ לִי לְהַעֲמִיד חֲנַנְיָה מִישָׁאֵל וַעֲזַרְיָה, שֶׁנֶּאֱמַר בָּהֵן (דניאל א, ד) "יְלָדִים אֲשֶׁר אֵין בָּהֶם כָּל מוּם".