The Leanness of Forgetfulness

"He rebuked the Red sea also, and it was dried up:
so he led them through the depths, as through the wilderness.
10 And he saved them from the hand of him that hated them,
and redeemed them from the hand of the enemy.
11 And the waters covered their enemies:
there was not one of them left.
12 Then believed they his words;
they sang his praise.
13 They soon forgat his works;
they waited not for his counsel:
14 but lusted exceedingly in the wilderness,
and tempted God in the desert.
15 And he gave them their request;
but sent leanness into their soul."
Psalm 106:9

"Therefore shall the Lord, the Lord of hosts,
send among his fat ones leanness;
and under his glory he shall kindle a burning
like the burning of a fire."
Isaiah 10:16