Verses with the word observe in the Apocrypha (7 verses):

2 Esdras 7:21
For God hath given strait commandment to such as came, what they should do to live, even as they came, and what they should observe to avoid punishment.

Sirach 4:20
Observe the opportunity, and beware of evil; and be not ashamed when it concerneth thy soul.

Sirach 13:13
Observe, and take good heed, for thou walkest in peril of thy overthrowing: when thou hearest these things, awake in thy sleep.

Sirach 18:27
A wise man will fear in every thing, and in the day of sinning he will beware of offence: but a fool will not observe time.

Sirach 27:12
If thou be among the indiscreet, observe the time; but be continually among men of understanding.

1 Maccabees 2:67
Take also unto you all those that observe the law, and avenge ye the wrong of your people.

2 Maccabees 6:8
Moreover there went out a decree to the neighbour cities of the heathen, by the suggestion of Ptolemee, against the Jews, that they should observe the same fashions, and be partakers of their sacrifices: