λαμάlamá

why: Matthew 27:46, Mark 15:34 (λεμά LT, λαμμᾶ, Rec.).

Greek (New Testament) · G2982

Same root

מָהmâh · H4100properly, interrogative what? (including how? why? when?); but also exclamation, what! (including how!), or indefinitely what (including whatever, and even relatively, that which); often used with prefixes in various adverbial or conjunctive senses

Where it appears

Appears 2 times in the Bible.

Matthew 27:46 At about three o’clock, Jesus called out with a loud voice, “Eli, Eli, lema sabachthani?” which means “My God, my God, why have you abandoned me?”
Mark 15:34 Then at three o’clock Jesus called out with a loud voice, “Eloi, Eloi, lema sabachthani?” which means “My God, my God, why have you abandoned me?”

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.