Matthew 18:28,29

But the same servant went out, and found one of his fellow-servants which owed him an hundred pence - Greek, δεναριον denarion; Latin, denarius; a Roman silver coin in common use. When Greece became subject to the Romans, and especially under the emperors, the denarius was regarded as of equal value with the Attic drachma - about 7 1/2 d. sterling, or 15 cents (circa 1880’s); consequently, this debt was about 15 dollars - a very small sum compared with what had been forgiven to the first servant. Perhaps our Saviour, by this, meant to teach that the offences which our fellow-men commit against us are very small and insignificant compared with our offences against God. Since God has forgiven us so much we ought to forgive each other the small offences which are committed.

Took him by the throat - Took him in a violent and rough manner - half choked or throttled him. This was the more criminal and base, as he had himself been so kindly treated and dealt so mildly with by his lord.

Besought - Entreated, pled with him.