Surah Ali 'Imran 3:39

فَنَادَتْهُ ٱلْمَلَـٰٓئِكَةُ وَهُوَ قَآئِمٌ يُصَلِّى فِى ٱلْمِحْرَابِ أَنَّ ٱللَّهَ يُبَشِّرُكَ بِيَحْيَىٰ مُصَدِّقًۢا بِكَلِمَةٍ مِّنَ ٱللَّهِ وَسَيِّدًا وَحَصُورًا وَنَبِيًّا مِّنَ ٱلصَّـٰلِحِينَ

So the angels called him while he was standing in prayer in the chamber, "Indeed, Allāh gives you good tidings of John, confirming a word from Allāh and [who will be] honorable, abstaining [from women], and a prophet from among the righteous."

Translation: Saheeh International

Tafsir

And the angels namely Gabriel called to him standing in the sanctuary in the temple at worship that anna means bi-anna; a variant reading has inna implying a direct speech statement ‘God gives you good tidings read yubashshiruka or yubshiruka of John who shall confirm a Word being from God namely Jesus that he is …

Excerpt from Tafsir al-Jalalayn, commentary on 3:39, via Quran.com. The reader has the full commentary and 9 more tafsirs.