What are some of the Prophetic hadiths reported on the virtue of reflecting on the Qur'an?

Reflecting on and understanding the Quran is the ultimate goal of its recitation, for it expands breasts and enlightens hearts, as Allah Almighty said: (Do they not then reflect on the Quran?) and ( [This is] a Book which We have sent down to you, full of blessings, that they may ponder over its Verses). The Prophet, peace and blessings be upon him, used to reflect on the Quran in his prayer; he would glorify Allah at verses of glorification, ask at verses of asking, and seek refuge at verses of verses of punishment. This indicates the importance of reflecting on the meanings of the words and pondering over them. A weak hadith (definition) has been reported that encourages reflection on the Quran: "O People of the Book, do not make the Quran a pillow, but recite it as it should be recited throughout the night and day, disseminate it, and reflect on what is in it, that you may succeed."