Yohanes 1:49

1:49 Nathanael answered him, “Rabbi, you are the Son of God; you are the king ¹  of Israel!” ² 

Matius 4:3

4:3 The tempter came and said to him, “If you are the Son of God, command these stones to become bread.” ³ 

[1:49]  ¹ tn Although βασιλεύς (basileus) lacks the article it is definite due to contextual and syntactical considerations. See ExSyn 263.

[1:49]  ² sn Nathanael’s confession – You are the Son of God; you are the King of Israel – is best understood as a confession of Jesus’ messiahship. It has strong allusions to Ps 2:6-7, a well-known messianic psalm. What Nathanael’s exact understanding was at this point is hard to determine, but “son of God” was a designation for the Davidic king in the OT, and Nathanael parallels it with King of Israel here.

[4:3]  ³ tn Grk “say that these stones should become bread.”