It's so easy to be grateful right after the miracle!

Exodous 15:1-13   Bible Gateway link

The Song of Moses

15 Then Moses and the people of Israel sang this song to the Lord, saying,

“I will sing to the Lord, for he has triumphed gloriously;
    the horse and his rider^[a] he has thrown into the sea.
² The Lord is my strength and my song,
    and he has become my salvation;
this is my God, and I will praise him,
    my father's God, and I will exalt him.
³ The Lord is a man of war;
    the Lord is his name.

⁴ “Pharaoh's chariots and his host he cast into the sea,
    and his chosen officers were sunk in the Red Sea.
⁵ The floods covered them;
    they went down into the depths like a stone.
⁶ Your right hand, O Lord, glorious in power,
    your right hand, O Lord, shatters the enemy.
⁷ In the greatness of your majesty you overthrow your adversaries;
    you send out your fury; it consumes them like stubble.
⁸ At the blast of your nostrils the waters piled up;
    the floods stood up in a heap;
    the deeps congealed in the heart of the sea.
⁹ The enemy said, ‘I will pursue, I will overtake,
    I will divide the spoil, my desire shall have its fill of them.
    I will draw my sword; my hand shall destroy them.’
¹⁰ You blew with your wind; the sea covered them;
    they sank like lead in the mighty waters.

¹¹ “Who is like you, O Lord, among the gods?
    Who is like you, majestic in holiness,
    awesome in glorious deeds, doing wonders?
¹² You stretched out your right hand;
    the earth swallowed them.

¹³ “You have led in your steadfast love the people whom you have redeemed;
    you have guided them by your strength to your holy abode.