To simplify the phrase bother here and in 13.2 . Used by both NIV and Jerusalem. To emphasize the lack of understanding. Used by NIV, Jerusalem and Phillips. See note 13.3 .
Evidence is slightly better than for other readings.
Used by Jerusalem. The word for Father is absent from some witnesses. However, its absence from four or five manuscripts is not significant. The meaning of the word here is the usual one, referring to various portions of the Old Testament. Here and in the next verse there is the sense that what the law says or ordains is fulfilled in the life and work of Jesus.