At the end of our parsha, Moshe Rabenu turns to Am Yisrael and asks of them
כִּ֛י שםֵׁ֥ ה ' אֶקְרָָ֑א הָבֵׁ֥ ו גֹדֶל לֵֽאלֹ הֵֽינ ו.
For the name of the Hashem I proclaim; Give glory to our God!
What this would seem to say is "When I call in God's name, you shall give God glory". What does this mean? What must we do? Does this mean that Moshe will sing and we must answer? How should we answer?
Our Rabbis teach us that Moshe was teaching the people that when they hear the song of Haazinu, they should answer "amen", meaning I have heard. This is the basis for many halachot, for example
מנין שעונין אמן אחר המברך? שאחרי ' כי ש ם ה' אֶקְרָא' נאמר 'הָב ו גֹדֶל לאלֹ הינ ו'.
From where do we know to answer amen after a bracha? Because after "For the name of the Hashem I proclaim" comes " Give glory to our God"
This is also the basis for the law of zimun, one calls "רבותי נברך " , proclaiming in God's name, and the others answer "יהי שם ה' מבורך וכו' ". We also learn the law of the bracha on Torah
אמר רב יהודה… מנין לברכת התורה לפניה מן התורה שנאמר 'כי שם ה' אקרא הבו גדל לאלהינו'.
Rav Yehuda said: How do we know to say a bracha before learning Torah , as it is written "For the name of the Hashem I proclaim give glory to our God"
All this from one verse!