Mark 8:17 καὶ γνοὺς λέγει αὐτοῖς· τί διαλογίζεσθε ὅτι ἄρτους οὐκ ἔχετε; οὔπω νοεῖτε οὐδὲ συνίετε; πεπωρωμένην ἔχετε τὴν καρδίαν ὑμῶν;
Jesus, perceiving it, said to them, "Why do you reason that it's because you have no bread? Don't you perceive yet, neither understand? Is your heart still hardened?
Noun: Accusative Singular Feminine

John 12:40 τετύφλωκεν αὐτῶν τοὺς ὀφθαλμοὺς καὶ ἐπώρωσεν αὐτῶν τὴν καρδίαν, ἵνα μὴ ἴδωσιν τοῖς ὀφθαλμοῖς καὶ νοήσωσιν τῇ καρδίᾳ καὶ στραφῶσιν, καὶ ἰάσομαι αὐτούς.
"He has blinded their eyes and he hardened their heart, lest they should see with their eyes, and perceive with their heart, and would turn, and I would heal them."
Noun: Accusative Singular Feminine

John 13:2 καὶ δείπνου γινομένου τοῦ διαβόλου ἤδη βεβληκότος εἰς τὴν καρδίαν ἵνα παραδοῖ αὐτὸν Ἰούδας Σίμωνος Ἰσκαριώτης / Ἰσκαριώτου,
During supper, the devil having already put into the heart of Judas Iscariot, Simon's son, to betray him,
Noun: Accusative Singular Feminine

John 16:6 ἀλλ' ὅτι ταῦτα λελάληκα ὑμῖν ἡ λύπη πεπλήρωκεν ὑμῶν τὴν καρδίαν.
But because I have told you these things, sorrow has filled your heart.
Noun: Accusative Singular Feminine

Acts 2:37 ἀκούσαντες δὲ κατενύγησαν τὴν καρδίαν εἶπόν τε πρὸς τὸν Πέτρον καὶ τοὺς λοιποὺς ἀποστόλους· τί ποιήσωμεν, ἄνδρες ἀδελφοί;
Now when they heard this, they were cut to the heart, and said to Peter and the rest of the apostles, "Brothers, what shall we do?"
Noun: Accusative Singular Feminine

Acts 5:3 εἶπεν δὲ ὁ Πέτρος· Ἁνανία, διὰ τί ἐπλήρωσεν ὁ Σατανᾶς τὴν καρδίαν σου, ψεύσασθαί σε τὸ πνεῦμα τὸ ἅγιον καὶ νοσφίσασθαι ἀπὸ τῆς τιμῆς τοῦ χωρίου;
But Peter said, "Ananias, why has Satan filled your heart to lie to the Holy Spirit, and to keep back part of the price of the land?
Noun: Accusative Singular Feminine

Acts 7:23 ὡς δὲ ἐπληροῦτο αὐτῷ τεσσερακονταετὴς χρόνος ἀνέβη ἐπὶ τὴν καρδίαν αὐτοῦ ἐπισκέψασθαι τοὺς ἀδελφοὺς αὐτοῦ τοὺς υἱοὺς Ἰσραήλ.
But when he was forty years old, it came into his heart to visit his brothers, the children of Israel.
Noun: Accusative Singular Feminine

Acts 13:22 καὶ μεταστήσας αὐτὸν ἤγειρεν τὸν Δαυὶδ αὐτοῖς εἰς βασιλέα ᾧ καὶ εἶπεν μαρτυρήσας· εὗρον Δαυὶδ τὸν τοῦ Ἰεσσαί ἄνδρα κατὰ τὴν καρδίαν μου, ὃς ποιήσει πάντα τὰ θελήματά μου.
When he had removed him, he raised up David to be their king, to whom he also testified, 'I have found David the son of Jesse, a man after my heart, who will do all my will.'
Noun: Accusative Singular Feminine

Acts 16:14 καί τις γυνὴ ὀνόματι Λυδία πορφυρόπωλις πόλεως Θυατείρων σεβομένη τὸν θεόν, ἤκουεν, ἧς ὁ κύριος διήνοιξεν τὴν καρδίαν προσέχειν τοῖς λαλουμένοις ὑπὸ [τοῦ] Παύλου.
A certain woman named Lydia, a seller of purple, of the city of Thyatira, one who worshiped God, heard us; whose heart the Lord opened to listen to the things which were spoken by Paul.
Noun: Accusative Singular Feminine

Acts 21:13 τότε ἀπεκρίθη ὁ Παῦλος· τί ποιεῖτε κλαίοντες καὶ συνθρύπτοντές μου τὴν καρδίαν; ἐγὼ γὰρ οὐ μόνον δεθῆναι ἀλλὰ καὶ ἀποθανεῖν εἰς Ἰερουσαλὴμ ἑτοίμως ἔχω ὑπὲρ τοῦ ὀνόματος τοῦ κυρίου Ἰησοῦ.
Then Paul answered, "What are you doing, weeping and breaking my heart? For I am ready not only to be bound, but also to die at Jerusalem for the name of the Lord Jesus."
Noun: Accusative Singular Feminine

Romans 2:5 κατὰ δὲ τὴν σκληρότητά σου καὶ ἀμετανόητον καρδίαν θησαυρίζεις σεαυτῷ ὀργὴν ἐν ἡμέρᾳ ὀργῆς καὶ ἀποκαλύψεως δικαιοκρισίας τοῦ θεοῦ
But according to your hardness and unrepentant heart you are treasuring up for yourself wrath in the day of wrath, revelation, and of the righteous judgment of God;
Noun: Accusative Singular Feminine

1 Corinthians 2:9 ἀλλὰ καθὼς γέγραπται· ἃ ὀφθαλμὸς οὐκ εἶδεν καὶ οὖς οὐκ ἤκουσεν καὶ ἐπὶ καρδίαν ἀνθρώπου οὐκ ἀνέβη, ὅσα / ἃ ἡτοίμασεν ὁ θεὸς τοῖς ἀγαπῶσιν αὐτόν.
But as it is written, "Things which an eye didn't see, and an ear didn't hear, which didn't enter into the heart of man, these God has prepared for those who love him."
Noun: Accusative Singular Feminine

2 Corinthians 3:15 ἀλλ' ἕως σήμερον ἡνίκα ἂν ἀναγινώσκηται Μωϋσῆς, κάλυμμα ἐπὶ τὴν καρδίαν αὐτῶν κεῖται·
But to this day, when Moses is read, a veil lies on their heart.
Noun: Accusative Singular Feminine

Hebrews 13:9 διδαχαῖς ποικίλαις καὶ ξέναις μὴ παραφέρεσθε· καλὸν γὰρ χάριτι βεβαιοῦσθαι τὴν καρδίαν, οὐ βρώμασιν ἐν οἷς οὐκ ὠφελήθησαν οἱ περιπατοῦντες.
Don't be carried away by various and strange teachings, for it is good that the heart be established by grace, not by food, through which those who were so occupied were not benefited.
Noun: Accusative Singular Feminine

James 1:26 Εἴ τις δοκεῖ θρησκὸς εἶναι μὴ χαλιναγωγῶν γλῶσσαν ἑαυτοῦ / αὐτοῦ ἀλλὰ ἀπατῶν καρδίαν ἑαυτοῦ / αὐτοῦ, τούτου μάταιος ἡ θρησκεία.
If anyone among you thinks himself to be religious while he doesn't bridle his tongue, but deceives his heart, this man's religion is worthless.
Noun: Accusative Singular Feminine

2 Peter 2:14 ὀφθαλμοὺς ἔχοντες μεστοὺς μοιχαλίδος καὶ ἀκαταπάστους / ἀκαταπαύστους ἁμαρτίας. δελεάζοντες ψυχὰς ἀστηρίκτους, καρδίαν γεγυμνασμένην πλεονεξίας ἔχοντες, κατάρας τέκνα·
having eyes full of adultery, and who can't cease from sin; enticing unsettled souls; having a heart trained in greed; children of cursing;
Noun: Accusative Singular Feminine

1 John 3:19 [Καὶ] ἐν τούτῳ γνωσόμεθα ὅτι ἐκ τῆς ἀληθείας ἐσμέν, καὶ ἔμπροσθεν αὐτοῦ πείσομεν τὴν καρδίαν ἡμῶν,
And by this we know that we are of the truth, and persuade our hearts before him,
Noun: Accusative Singular Feminine