Col. iii. 16, Eph. v. 19.
For instance, the parallel passages Ephes. v. 19 and Col. iii. 16 stand thus in the received text:
Ephesians.
λαλοῦντες ἑαυτοῖς ψαλμοῖς καὶ ὕμνοις καὶ ᾠδαῖς πνευματικαῖς ᾄδοντες καὶ ψάλλοντες ἐν τῇ καρδίᾳ ὑμῶν τῷ Κυρίῳ.
Colossians.
διδάσκοντες καὶ νουθετοῦντες ἑαυτοὺς ψαλμοῖς καὶ ὕμνοις καὶ ᾠδαῖς πνευματικαῖς ἐν χάριτι ᾄδοντες ἐν τῇ καρδίᾳ ὑμῶν τῷ Κυρίῳ.
And A carries the harmonizing tendency still further by inserting ἐν χάριτι before ᾄδοντες in Ephes. from the parallel passage.
In B they are read as follows:
λαλοῦντες ἑαυτοῖς ἐν ψαλμοῖς καὶ ὕμνοις καὶ ᾠδαῖς ᾄδοντες καὶ ψάλλοντες τῇ καρδίᾳ ὑμῶν τῷ Κυρίῳ.
διδάσκοντες καὶ νουθετοῦντες ἑαυτοὺς ψαλμοῖς ὕμνοις ᾠδαῖς πνευματικαῖς ἐν τῇ χάριτι ᾄδοντες ἐν ταῖς καρδίαις ὑμῶν τῷ Θεῷ.