Matthew 10:21 παραδώσει δὲ ἀδελφὸς ἀδελφὸν εἰς θάνατον καὶ πατὴρ τέκνον καὶ ἐπαναστήσονται τέκνα ἐπὶ γονεῖς καὶ θανατώσουσιν αὐτούς.
"Brother will deliver up brother to death, and the father his child. Children will rise up against parents, and cause them to be put to death.
Noun: Accusative Singular Neuter

Matthew 21:28 Τί δὲ ὑμῖν δοκεῖ; ἄνθρωπος εἶχεν τέκνα δύο. [καὶ] προσελθὼν τῷ πρώτῳ εἶπεν· τέκνον, ὕπαγε σήμερον ἐργάζου ἐν τῷ ἀμπελῶνι.
But what do you think? A man had two sons, and he came to the first, and said, 'Son, go work today in my vineyard.'
Noun: Vocative Singular Neuter

Mark 2:5 καὶ ἰδὼν ὁ Ἰησοῦς τὴν πίστιν αὐτῶν λέγει τῷ παραλυτικῷ· τέκνον ἀφίενταί σου αἱ ἁμαρτίαι.
Jesus, seeing their faith, said to the paralytic, "Son, your sins are forgiven you."
Noun: Vocative Singular Neuter

Mark 12:19 διδάσκαλε Μωϋσῆς ἔγραψεν ἡμῖν ὅτι ἐάν τινος ἀδελφὸς ἀποθάνῃ καὶ καταλίπῃ γυναῖκα καὶ μὴ ἀφῇ τέκνον, ἵνα λάβῃ ὁ ἀδελφὸς αὐτοῦ τὴν γυναῖκα καὶ ἐξαναστήσῃ σπέρμα τῷ ἀδελφῷ αὐτοῦ.
"Teacher, Moses wrote to us, 'If a man's brother dies, and leaves a wife behind him, and leaves no children, that his brother should take his wife, and raise up offspring for his brother.'
Noun: Accusative Singular Neuter

Mark 13:12 καὶ παραδώσει ἀδελφὸς ἀδελφὸν εἰς θάνατον καὶ πατὴρ τέκνον καὶ ἐπαναστήσονται τέκνα ἐπὶ γονεῖς καὶ θανατώσουσιν αὐτούς·
"Brother will deliver up brother to death, and the father his child. Children will rise up against parents, and cause them to be put to death.
Noun: Accusative Singular Neuter

Luke 1:7 καὶ οὐκ ἦν αὐτοῖς τέκνον, καθότι ἦν ἡ Ἐλισάβετ στεῖρα, καὶ ἀμφότεροι προβεβηκότες ἐν ταῖς ἡμέραις αὐτῶν ἦσαν.
But they had no child, because Elizabeth was barren, and they both were well advanced in years.
Noun: Nominative Singular Neuter

Luke 2:48 καὶ ἰδόντες αὐτὸν ἐξεπλάγησαν, καὶ εἶπεν πρὸς αὐτὸν ἡ μήτηρ αὐτοῦ· τέκνον, τί ἐποίησας ἡμῖν οὕτως; ἰδοὺ ὁ πατήρ σου (καὶ) ἐγὼ / κἀγὼ ὀδυνώμενοι ζητοῦμεν / ἐζητοῦμέν σε.
When they saw him, they were astonished, and his mother said to him, "Son, why have you treated us this way? Behold, your father and I were anxiously looking for you."
Noun: Vocative Singular Neuter

Luke 15:31 ὁ δὲ εἶπεν αὐτῷ· τέκνον, σὺ πάντοτε μετ' ἐμοῦ εἶ, καὶ πάντα τὰ ἐμὰ σά ἐστιν·
"He said to him, 'Son, you are always with me, and all that is mine is yours.
Noun: Vocative Singular Neuter

Luke 16:25 εἶπεν δὲ Ἀβραάμ· τέκνον, μνήσθητι ὅτι ἀπέλαβες τὰ ἀγαθά σου ἐν τῇ ζωῇ σου, καὶ Λάζαρος ὁμοίως τὰ κακά· νῦν δὲ ὧδε παρακαλεῖται, σὺ δὲ ὀδυνᾶσαι.
"But Abraham said, 'Son, remember that you, in your lifetime, received your good things, and Lazarus, in the same way, bad things. But now here he is comforted and you are in anguish.
Noun: Vocative Singular Neuter

1 Corinthians 4:17 διὰ τοῦτο ἔπεμψα ὑμῖν Τιμόθεον, ὅς ἐστίν μου τέκνον ἀγαπητὸν καὶ πιστὸν ἐν κυρίῳ, ὃς ὑμᾶς ἀναμνήσει τὰς ὁδούς μου τὰς ἐν Χριστῷ Ἰησοῦ, καθὼς πανταχοῦ ἐν πάσῃ ἐκκλησίᾳ διδάσκω.
Because of this I have sent Timothy to you, who is my beloved and faithful child in the Lord, who will remind you of my ways which are in Christ, even as I teach everywhere in every assembly.
Noun: Nominative Singular Neuter

Philippians 2:22 τὴν δὲ δοκιμὴν αὐτοῦ γινώσκετε, ὅτι ὡς πατρὶ τέκνον σὺν ἐμοὶ ἐδούλευσεν εἰς τὸ εὐαγγέλιον.
But you know the proof of him, that, as a child serves a father, so he served with me in furtherance of the Good News.
Noun: Nominative Singular Neuter

1 Timothy 1:18 Ταύτην τὴν παραγγελίαν παρατίθεμαί σοι, τέκνον Τιμόθεε, κατὰ τὰς προαγούσας ἐπὶ σὲ προφητείας, ἵνα στρατεύῃ ἐν αὐταῖς τὴν καλὴν στρατείαν
This instruction I commit to you, my child Timothy, according to the prophecies which led the way to you, that by them you may wage the good warfare;
Noun: Vocative Singular Neuter

2 Timothy 2:1 Σὺ οὖν, τέκνον μου, ἐνδυναμοῦ ἐν τῇ χάριτι τῇ ἐν Χριστῷ Ἰησοῦ,
You therefore, my child, be strengthened in the grace that is in Christ Jesus.
Noun: Vocative Singular Neuter

Revelation 12:4 καὶ ἡ οὐρὰ αὐτοῦ σύρει τὸ τρίτον τῶν ἀστέρων τοῦ οὐρανοῦ καὶ ἔβαλεν αὐτοὺς εἰς τὴν γῆν καὶ ὁ δράκων ἕστηκεν ἐνώπιον τῆς γυναικὸς τῆς μελλούσης τεκεῖν, ἵνα ὅταν τέκῃ τὸ τέκνον αὐτῆς καταφάγῃ.
His tail drew one third of the stars of the sky, and threw them to the earth. The dragon stood before the woman who was about to give birth, so that when she gave birth he might devour her child.
Noun: Accusative Singular Neuter

Revelation 12:5 καὶ ἔτεκεν υἱόν ἄρσεν, ὃς μέλλει ποιμαίνειν πάντα τὰ ἔθνη ἐν ῥάβδῳ σιδηρᾷ. καὶ ἡρπάσθη τὸ τέκνον αὐτῆς πρὸς τὸν θεὸν καὶ πρὸς τὸν θρόνον αὐτοῦ.
She gave birth to a son, a male child, who is to rule all the nations with a rod of iron. Her child was caught up to God, and to his throne.
Noun: Nominative Singular Neuter