Why Is The Word "Fasting" Missing From Mark 9:29 In The NASB and ESV If These Are More "Accurate" Translations?

This verse is similar to Matthew 17:21 "Howbeit this kind goeth not out but by prayer and fasting" So there is an obvious difference in prayer without and with fasting. Why was the word "fasting" left out of some of the modern translations and not the KJV and HCSB? (King James Version) 29... show more This verse is similar to Matthew 17:21 "Howbeit this kind goeth not out but by prayer and fasting"
So there is an obvious difference in prayer without and with fasting. Why was the word "fasting" left out of some of the modern translations and not the KJV and HCSB?

(King James Version)
29 And he said unto them, This kind can come forth by nothing, but by prayer and fasting

(Holman Christian Standard Bible)
29 And He told them, "This kind can come out by nothing but prayer (A) [and fasting (B) ]


(English Standard Version)
29 And he said to them, "This kind cannot be driven out by anything but prayer

(NASB)
29 "And He said to them, "This kind cannot come out by anything but prayer."

(NIV)
29 " He replied, “This kind can come out only by prayer"
3 answers 3