The obligation of going out for Jihad

وَقَوْلِهِ: {انْفِرُوا خِفَافًا وَثِقَالاً وَجَاهِدُوا بِأَمْوَالِكُمْ وَأَنْفُسِكُمْ فِي سَبِيلِ اللَّهِ ذَلِكُمْ خَيْرٌ لَكُمْ إِنْ كُنْتُمْ تَعْلَمُونَ لَوْ كَانَ عَرَضًا قَرِيبًا وَسَفَرًا قَاصِدًا لاَتَّبَعُوكَ وَلَكِنْ بَعُدَتْ عَلَيْهِمُ الشُّقَّةُ وَسَيَحْلِفُونَ بِاللَّهِ} الآيَةَ. وَقَوْلِهِ: {يَا أَيُّهَا الَّذِينَ آمَنُوا مَا لَكُمْ إِذَا قِيلَ لَكُمُ انْفِرُوا فِي سَبِيلِ اللَّهِ اثَّاقَلْتُمْ إِلَى الأَرْضِ أَرَضِيتُمْ بِالْحَيَاةِ الدُّنْيَا مِنَ الآخِرَةِ} إِلَى قَوْلِهِ: {عَلَى كُلِّ شَيْءٍ قَدِيرٌ}. يُذْكَرُ عَنِ ابْنِ عَبَّاسٍ انْفِرُوا ثُبَاتًا سَرَايَا مُتَفَرِّقِينَ، يُقَالُ أَحَدُ الثُّبَاتِ ثُبَةٌ.And the Statement of Allah عز وجل: "March forth, whether you are light (being young, healthy and wealthy) or heavy (being ill, old and poor), and strive hard with your wealth and your lives in the Cause of Allah. This is better for you, if you but knew. Had it been a near gain (booty in front of them) and an easy journey, they would have followed you, but the distance (Tabuk expedition) was long for them, and they would swear by Allah (saying), ‘If we only could, we would certainly have come forth with you.’ They destroy their ownselves, and Allah knows that they are liars." (V.9:41,42) And His Statement: "O you who believe! What is the matter with you, that when you are asked to march forth in the Cause of Allah, (i.e., Jihad), you cling heavily to the earth? Are you pleased with the life of this world rather than the Hereafter?" (up to) Able to do all things." (V.9:38-39)