The above is a display of your ignorance regarding Bible translations.
Matthew 17:21
NIV/ESV omits
Greek from 2nd century, Diatessaron, and many others
"τουτο δε το γενος ουκ εκπορευεται ει μη εν προσευχη και νηστεια"
τοῦτο δὲ τὸ γένος οὐκ ἐκπορεύεται εἰ μὴ ἐν προσευχῇ καὶ νηστείᾳ] (see Mark 9:29) (א2 οὐκ ἐκβάλλεται) C D E F G H K L O W X Y Δ Π Σ f1 f13 22 28 (118 205 209 1505 ℓ1074 ἐξέρχεται) 157 180 565 597 700 892c 1006 1009 1010 1071 1079 (1195 omit δὲ) 1216 1230 1241 1242 1243 1253 1292 1342 1344 1365 1424 1546 1646 2148 2174 Byz Lect (ℓ184) (ℓ514) ita itaur itb itc itd itf itff2 itg1 itl itn itq itr1 vg (syrp syrh) (copmae) copbo(pt) arm ethpp ethTH geoB slav Diatessaron Origen Asterius Hilary Basil Ambrose Chrysostom Jerome Augustine ς
"However, this kind goeth not out, but by prayer and fasting"
Mark 9:29
NIV "He replied, "This kind can come out only by prayer."
ESV "And he said to them, “This kind cannot be driven out by anything but prayer"
Greek from 2nd century, Diatessaron, and many others
"και ειπεν αυτοις τουτο το γενος εν ουδενι δυναται εξελθειν ει μη εν προσευχη και νηστεια"
προσευχῇ καὶ νηστείᾳ] p45vid א2 A C D E F G H K L N W X (Δ τῇ νηστείᾳ) Θ Π Σ Ψ f1 f13 28 33 157 180 205 565 579 597 700 892 1006 1009 1010 1071 1079 1195 1216 1230 1241 1242 1243 1253 1292 1342 1344 1365 1424 1505 1546 1646 2148 2174 Byz Lect ita itaur itb itc itd itf itff2 iti itl itq itr1 vg syrh copsa copbo goth geo2 slav Diatessarona Diatessaronp Basil ς
• νηστείᾳ καὶ προσευχῇ] (see 1Corinthians 7:5) syrs syrp syrpal copbo(ms) arm eth
"And he said to them, This kind can come forth by nothing, but by prayer
and fasting"
Before you accuse, know what you are talking about! Don't make the same mistakes others like Reformed1689 make, and show their foolishness!