But whereunto shall I liken this generation? - That is, the Jewish people - την γενεαν ταυτην, this race: and so the word γενεα is often to be understood in the evangelists.

In the markets - Or, places of concourse, αγοραις, from αγειρω, I gather together; not a market-place only, but any place of public resort: probably meaning here, places of public amusement.

Calling unto their fellows - Or, companions. Instead of εταιροις, companions, many of the best MSS. have ετεροις, others. The great similarity of the words might have easily produced this difference.

There are some to whom every thing is useful in leading them to God; others, to whom nothing is sufficient. Every thing is good to an upright mind, every thing bad to a vicious heart.

whereunto.

Lamentations 2:13 What thing shall I take to witness for you? what thing shall I liken to you, O daughter of Jerusalem? what shall I equal to you...

Mark 4:30 And he said, Whereunto shall we liken the kingdom of God? or with what comparison shall we compare it?

Luke 13:18 Then said he, To what is the kingdom of God like? and whereunto shall I resemble it?

this.

Matthew 12:34 O generation of vipers, how can you, being evil, speak good things? for out of the abundance of the heart the mouth speaks.

Matthew 23:36 Truly I say to you, All these things shall come on this generation.

Matthew 24:34 Truly I say to you, This generation shall not pass, till all these things be fulfilled.

It is.

Luke 7:31-35 And the Lord said, Whereunto then shall I liken the men of this generation? and to what are they like...

John's Doubts of Jesus, and Jesus' Praise of John
'Now when John had heard in the prison the works of Christ, he sent two of his disciples, 3. And said unto Him, Art Thou He that should come, or do we look for another? 4. Jesus answered and said unto them, Go and shew John again those things which ye do hear and see: 5. The blind receive their sight, and the lame walk, the lepers are cleansed, and the deaf hear, the dead are raised up, and the poor have the gospel preached to them. 6. And blessed is he, whosoever shall not be offended in Me. 7. …
Alexander Maclaren—Expositions of Holy Scripture

Again on the Words of the Gospel, Matt. xi. 28, "Come unto Me, all Ye that Labour and are Heavy Laden, and I Will Give You
1. It seems strange to some, Brethren, when they hear the Lord say, "Come unto Me, all ye that labour and are heavy laden, and I will refresh you. Take my yoke upon you and learn of Me, for I am meek and lowly in heart, and ye shall find rest unto your souls. For My yoke is easy and My burden is light." [2323] And they consider that they who have fearlessly bowed their necks to this yoke, and have with much submission taken this burden upon their shoulders, are tossed about and exercised by so great …
Saint Augustine—sermons on selected lessons of the new testament

The Sinner's Friend
"Savior of sinners they proclaim, Sinners of whom the chief I am." What the invidious Jews said in bitter spleen, has been turned by the Holy Spirit to the most gracious account. Where they poured out vials of hate, odours of sacred incense arise. Troubled consciences have found a sweet balm in the very sound. Jesus, "the friend of publicans and sinners," has proved himself friendly to them, and they have become friends with him; so completely has he justified the very name which his enemies gave …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 10: 1864