Adam Clarke on James 1:19

Swift to hear - Talk little and work much, is a rabbinical adage. - Pirkey Aboth, cap. i. 15.

The righteous speak little, and do much; the wicked speak much, and do nothing. - Bava Metzia, fol. 87.

The son of Sirach says, cap. v. 11: Γινου ταχυς εν τῃ ακροασει σου, και εν μακροθυμιᾳ φθεγγου αποκρισιν. "Be swift to hear, and with deep consideration give answer."

Slow to wrath - "There are four kinds of dispositions," says the Midrash hanaalam, cap. v. 11: "First, Those who are easily incensed, and easily pacified; these gain on one hand, and lose on the other. Secondly, Those who are not easily incensed, but are difficult to be appeased; these lose on the one hand, and gain on the other. Thirdly, Those who are difficult to be incensed, and are easily appeased; these are the good. Fourthly, Those who are easily angered, and difficult to be appeased; these are the wicked." Those who are hasty in speech are generally of a peevish or angry disposition. A person who is careful to consider what he says, is not likely to be soon angry.