ISB ~ Matthew 9 v15
the bridegroom:A depiction of Jesus found elsewhere in Matthew (25:1-13). See note on Mk 2:19.
• Similar OT imagery depicts Yahweh as the husband of Old Covenant Israel (Is 54:5; Jer 3:20; Hos 2:14-20). Jesus takes this role upon himself and is now the divine spouse of the New Covenant Church (Jn 3:29; Eph 5:25; Rev 19:7-9; CCC 796).
The days will come:Only after Jesus’ departure (Passion and Ascension) is fasting appropriate (cf. 6:16).