Matthew 26:41 γρηγορεῖτε καὶ προσεύχεσθε ἵνα μὴ εἰσέλθητε εἰς πειρασμόν· τὸ μὲν πνεῦμα πρόθυμον ἡ δὲ σὰρξ ἀσθενής.
Watch and pray, that you don't enter into temptation. The spirit indeed is willing, but the flesh is weak."
Adjective: Nominative Singular Feminine

Mark 14:38 γρηγορεῖτε καὶ προσεύχεσθε, ἵνα μὴ ἔλθητε εἰς πειρασμόν· τὸ μὲν πνεῦμα πρόθυμον ἡ δὲ σὰρξ ἀσθενής.
Watch and pray, that you may not enter into temptation. The spirit indeed is willing, but the flesh is weak."
Adjective: Nominative Singular Feminine

1 Corinthians 8:7 ἀλλ' οὐκ ἐν πᾶσιν ἡ γνῶσις· τινὲς δὲ τῇ συνηθείᾳ ἕως ἄρτι τοῦ εἰδώλου ὡς εἰδωλόθυτον ἐσθίουσιν, καὶ ἡ συνείδησις αὐτῶν ἀσθενὴς οὖσα μολύνεται.
However, that knowledge isn't in all men. But some, with consciousness of the idol until now, eat as of a thing sacrificed to an idol, and their conscience, being weak, is defiled.
Adjective: Nominative Singular Feminine

1 Corinthians 9:22 ἐγενόμην τοῖς ἀσθενέσιν ἀσθενής, ἵνα τοὺς ἀσθενεῖς κερδήσω· τοῖς πᾶσιν γέγονα πάντα, ἵνα πάντως τινὰς σώσω.
To the weak I became as weak, that I might gain the weak. I have become all things to all men, that I may by all means save some.
Adjective: Nominative Singular Masculine

2 Corinthians 10:10 ὅτι αἱ ἐπιστολαὶ μέν, φησίν, βαρεῖαι καὶ ἰσχυραί, ἡ δὲ παρουσία τοῦ σώματος ἀσθενὴς καὶ ὁ λόγος ἐξουθενημένος.
For, "His letters," they say, "are weighty and strong, but his bodily presence is weak, and his speech is despised."
Adjective: Nominative Singular Feminine