Mrs Mopp "Out of the strong came forth sweetness" is part of a riddle set by Samson for the Philistine guests at his wedding, and based on his finding a nest of bees in the carcase of a lion he had killed (on his way to find his bride); Samson's wife wheedles the answer out of him and gives it away.
His wife's name was Delilah, a Philistine - the Philistines were the enemy - who was later bribed to find out the source of Samson's great strength. She sweet-talked the answer out of him - it was his long hair, which he never cut. She waited until he was asleep, then shaved it all off, whereupon her co-conspirators rushed in, bound him and took him captive.
He was imprisoned in the temple of Dagon at Gaza, blinded and chained to one of the pillars, to be jeered at and tormented by his captors, and in his weakness was unable to escape or retaliate.
However, after some time, his hair had grown again, and his strength gradually returned. He waited until a large number of his enemies were gathered together, then stood between two pillars and pushed on them both until they gave way and the roof fell in, killing all those inside - including Samson.